Final answer:
The carbon cycle involves the movement of carbon between different parts of the Earth. Inputs include combustion, respiration, and decomposition, while outputs include carbon dioxide and carbon stored in organisms through photosynthesis.
Step-by-step explanation:
The carbon cycle involves the movement of carbon between the atmosphere, oceans, biosphere, and geosphere. Inputs into the carbon cycle include carbon dioxide from sources such as combustion and respiration, as well as carbon from the decomposition of life forms. Outputs from the carbon cycle include carbon dioxide released into the atmosphere and carbon stored in living organisms through photosynthesis. Acid rain is not directly involved in the carbon cycle.