The carbon cycle involves a variety of processes that move and convert carbon between Earth systems. The diagram summarizes the main processes of the carbon cycle.
Which pair of events could best be represented by only one arrow in the carbon cycle diagram?
a
Humans burn trees to release their energy, and humans burn fossil fuels to release their energy.
b
A plant performs photosynthesis, and carbon dioxide dissolves and acidifies ocean water.
c
A plant performs photosynthesis, and an animal performs cellular respiration.
d
Termites consume a tree trunk, and a tree trunk burns in a forest fire.
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The carbon cycle involves a variety of processes that move and convert carbon between Earth systems....
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