Answer;
D. Fungi, because they break down dead organisms
Explanation;
The process or stages involved in the cycling of carbon in an ecosystem includes;
- Carbon enters the atmosphere as carbon dioxide from respiration and combustion.
- Carbon dioxide is absorbed by producers to make glucose in photosynthesis.
- Animals feed on the plant passing the carbon compounds along the food chain. Most of the carbon they consume is exhaled as carbon dioxide that was formed during aerobic respiration. The animals and plants eventually die.
- Decomposers break down the dead organisms and return the carbon in their bodies to the atmosphere as carbon dioxide by respiration. However; the plant and animal material may then be available as fossil fuel in the future for combustion.
