Question

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

Explanation:

To determine where the greatest amount of the world's carbon is found, we analyze each option:

• "Plants and animals" store carbon, but not the largest amount.
• "Ocean" contains dissolved carbon, but not the largest reservoir.
• "Atmosphere" has carbon dioxide, but its carbon content is relatively small.
• "Seafloor sediments" hold a vast amount of carbon, including from marine organisms and geological processes, making it the largest carbon reservoir.

Answer:

seafloor sediments