The carbon cycle is the rotation of the carbon and its compound in the atmosphere. carbon is added to the atmosphere by burning fossils and is a waste product of respiration. Thus, options C and D are correct.
What is a carbon cycle?
A carbon cycle is a biogeochemical cycle that involves the reuse of the carbon from various sources that involve the atmosphere and organisms. The cycle repeats itself again and again.
When fossil fuel is burnt carbon dioxide along with some gases are released into the atmosphere. Also, carbon dioxide is a waste product of cellular respiration. Most of the carbon is present in rocks, oceans, and the atmosphere.
Therefore, the burning of fossils releases carbon.
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