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Understand: the carbon cycle


The following diagram shows the carbon cycle.
A diagram shows processes within the carbon cycle connected by arrows indicating the flow of carbon within and between the atmosphere, land, and ocean. Four arrows are labeled. Arrow one points from cows to the atmosphere. Arrow two points from the atmosphere toward the trees. Arrow three points from the soil to an area deep underground. Arrow four points from a factory toward the atmosphere.
Which arrow in the diagram represents cellular respiration?
Choose 1 answer: