The integrated writing task of TOEFL is the most complex task in TOEFL writing where the candidates need to write an essay after reading a passage and listening to a lecture on the same topic. TOEFL writing integrated task is more difficult compared to TOEFL writing independent task. TOEFL writing template helps with the most scoring TOEFL integrated writing task structure. 

This particular TOEFL integrated writing sample answer speaks about Iron Fertilization which is knowingly placed in the oceans for the stimulation of phytoplankton as those are necessary for the stability of ocean ecosystems. The reading and the lecture emphasizes how iron fertilization can prevent global warming. 

This particular topic is about an environmental issue and how it is dealt with. Most of the TOEFL writing topics are based on environmental issues, therefore, candidates need to have a slight knowledge of the ongoing phenomenon.

Iron Fertilizations are intentionally incorporated into various parts of the ocean for the stimulation procedure of phytoplankton components in the ocean body. Phytoplankton is a key component from the plankton community, which is a prominent segment of the ocean body ecosystems. The plankton component is a significant part of the ocean where there is a deficiency of Iron as it adheres to stimulation by absorbing carbon dioxide (CO2) from fresh air. Both the reading and the lecture focuses on the phenomenon of Iron Fertilization. Yet, the reading portion justifies that this specific process of Iron Fertilization is not a way to decrease the spread of Global Warming. The author believes that Iron Fertilization can prevent the effects of Global Warming. Moreover, the claims of the lecture are mentioned in this particular article.

Plankton components can extend iron Fertilization as they can lock carbon dioxide. But as per the claims of the author, plankton is not able to lock the considerable amount of carbon dioxide as per the researched data. As it is highly insoluble in ocean water, several limiting nutrients are the key factor for the mere growth of plankton. As per the readers' claims, the amount of carbon dioxide absorbed is much shorter as per the scientific considerations for iron-deficient ocean waters. On the other hand, the lecturer has a different viewpoint on the absorption of carbon dioxide. She justified saying that the total amount of carbon dioxide consumed is in the most prominent quantity. Moreover, she continues saying that the recent studies are yet not done for the total amount which the plankton absorbs of the carbon dioxide molecules. There is enough evidence which requires to justify the amount of CO2 absorption by plankton while its presence in the ocean water is yet to be found and studied accurately to find the most updated calculations.

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On the other hand, based on the claims of the author individually for the Iron Fertilization, the justifications declare that there are several toxic elements formed in the ocean water through the fertilization process. In addition to it, the claimed aspect of the fertilization procedure continues in the formation of red tides. However, this particular prospect of toxin in the ocean water was disapproved by the lecturer saying that the formation of the toxins related to Iron Fertilization is not a major aspect to consider while comparing it with the effects of global warming. Iron Fertilization occurs naturally when the ocean current comes from the deepest levels, which ultimately brings nutrients rich components, detoxifying the formation of toxins. But, the lecturer states that global warming will no longer be a threat of the Iron Fertilization intentional procedure is turned off. As it will eventually stop its contribution to the harmful effects causing the global warming phenomenon, which was believed earlier inculcating the effects.

The main purpose of the Iron Fertilization procedure is to increase and stimulate phytoplankton production in the iron-poor area of the ocean. In addition to this procedure, within the Iron Fertilization process, the components of Iron Sulphate are dumped in the iron-poor section. As the process of Iron Fertilization starts, iron molecules are artificially triggered by increasing the actual amount of the plankton. However, the author states that Iron Fertilization, which is the human intentional process, can affect the natural cycle of Iron Fertilization in the areas of the ocean where there is iron deficiency. Also, the increased amount of plankton will affect the natural cycle of the ocean food chain, eventually disrupting the natural process of iron restoration. Not only altering the natural cycle of restoration but the increased amount of plankton will also be responsible for disturbing the ocean habitat and the organisms which will feed on thaIronon fertilized brown powder. The effect rather than the positive side of increasing the iron proportion will be adversely affected. Molecules of plankton will get locked under the ocean bed by absorbing carbon dioxin from the ocean water and the atmosphere creating an unbalanced ecosystem for the ocean habitat.

As per the beliefs of the lecturer, the issue humans are facing in the name of global warming is much more prominent to consider on an earlier scale. In addition, the effects of global warming must be incorporated in the problem-solving list rather than the disturbance which is caused in the adverse aspects by the process of human-made Iron Fertilization. Finally, the lecturer intends to identify the larger-faced issue of global warming as every human on a global scale faces this particular phenomenon. Focusing on the aspects of Iron Fertilization which may be limited to certain portions of the ocean, compared to it, the issue of global warming is firmly stuck with the impactful earth. This worldwide issue requires prominent attention with several meaningful and impactful solutions to deteriorating the effects majorly on the ozone layer.