Carbon exists in many forms on earth. This diagram shows part of the carbon cycle.
A. It shows how matter can pass through an ecosystem.
B. It shows each step in the correct order that carbon must pass through.
C. It shows how carbon is constantly being formed and passed along.
D. It shows how carbon is running out because it is all being used up by animals.
PLEASE HELP!!
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Carbon exists in many forms on earth. This diagram shows part of the carbon cycle.
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