Which statement best explains how the animals in the diagram contribute to the carbon cycle? A.
They remove carbon from the atmosphere during respiration and replace it with oxygen that is used in photosynthesis.

B.
They eat plants and other organisms that contain carbon which prevents it from ever being stored.

C.
They remove carbon from the soil during respiration and exchange it with oxygen that evaporates into the atmosphere.

D.
They eat plants and other organisms which contain carbon and deposit carbon into the soil when they die.