Answer with Explanation:
Carbon Cycle is the movement of carbon (an element) from the atmosphere towards the Earth and its organisms (plants and animals) and then back to the atmosphere.
Carbon, as an element, forms the naturally-occurring gas in the atmosphere called carbon dioxide. People's activities also hasten the production of carbon dioxide such as the burning of oil, wood, coal, etc. Humans and animals naturally exhale carbon dioxide in the air too.
From the atmosphere, the Carbon Cycle starts with the first organism, which is the plant. The plant absorbs carbon dioxide from the atmosphere in order to aid in its food production called "photosynthesis." Carbon is actually the raw material in this process. It helps produce "oxygen" that is needed for the production of carbohydrates. This is released by plants in the atmosphere and is taken up by animals and humans. This is the function of plants in the carbon cycle.
