Astudent made a model to show the cycling of carbon.

food > consumers > carbon dioxide > producers > sugar

which necessary step in carbon recycling is missing from the student's model?

a. fertilizer, because it gives plants nutrients for growth
b. rocks, because they are broken down to make soil
c. pollinators, because they spread pollen from plant to plant
d. fungi, because they break down dead organisms

D. Fungi, because they break down dead organisms

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.

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