Answer:
cellular respiration
Explanation:
<em>hope this helps have a nice day</em>
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I think the answer to this would be A
C. Vegetation
because even though cows are important, all life is and not just that species and then cars and factories are unnatural and would not be critical for the carbon cycle in nature.
Answer:
earth sun
Explanation:
Thp90% of the earth uses solar energy