Where is the greatest amount of the world’s carbon found? atmosphere seafloor sediments ocean plants and animals

It is found in the atmosphere

The right anwser is the ocean.

Carbon is one of the most important atoms on Earth, it is present everywhere, on living entities or not. This means it's not only at home and at your dog, but also in areas such as fossil fuels and road destruction.

Carbon is also in the atmosphere where it is part of the carbon dioxide emitted when fossil fuels are burned and when living organisms breathe. It is in the organic matter of the soil and in the rocks.

Surprisingly, the most carbon on Earth is stored in the ocean. The number of tonnes of carbon in the ocean itself is estimated at between 38 and 40 trillion tonnes of carbon in marine sediments and sedimentary rocks.

it would be c. xylem.