Where is the greatest amount of the world’s carbon found?

atmosphere
seafloor sediments
ocean
plants and animals

The best answer to the question: Where is the greatest amount of the world´s carbon found, would be: the seafloor sediments, where the ocean deposits this element.

Explanation:

Although the most logical answer to this question would be the atmosphere, given that carbon is present in the form of carbon dioxide, the reality, and according to research done, is that carbon, as an element is present most of all in the ocean and it is the seafloor sediments that have become the biggest reservoirs of elemental carbon.

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answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation: