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.