AP BIOLOGY

Detailed explanation-1: -When the animals die, they decompose, and their remains become sediment, trapping the stored carbon in layers that eventually turn into rock or minerals. Some of this sediment might form fossil fuels, such as coal, oil, or natural gas, which release carbon back into the atmosphere when the fuel is burned.

Detailed explanation-2: -Fossilisation – if conditions are not favourable for the process of decomposition, dead organisms decay slowly or not at all. These organisms build up and, if compressed over millions of years, can form fossil fuels (coal, oil or gas).

Detailed explanation-3: -Carbon Cycle Steps Carbon present in the atmosphere is absorbed by plants for photosynthesis. These plants are then consumed by animals and carbon gets bioaccumulated into their bodies. These animals and plants eventually die, and upon decomposing, carbon is released back into the atmosphere.

Detailed explanation-4: -Photosynthesis, Decomposition, Respiration and Combustion. Carbon cycles from the atmosphere into plants and living things. For example, carbon is a pollutant in the atmosphere as carbon dioxide.