Which of the following best describes how carbon cycles through Earth's
systems?


A. Decomposers absorb carbon from dead organisms. Decomposers
exhale carbon dioxide, which is absorbed through plants' roots.
B. Animals inhale carbon dioxide. Carbon is released when animals
die. Plants absorb carbon through their roots.
C. Carbon dioxide is absorbed through plants' roots and released
through their leaves. Animals inhale the carbon dioxide. Carbon is
released into the soil by dead plants and animals.
D. Carbon dioxide is absorbed through plants' leaves and converted
to glucose. Animals eat the plants and exhale carbon dioxide.