Final answer:
The largest exchange of carbon in the carbon cycle is the dissolving and vaporizing of carbon dioxide between the atmosphere and the ocean surface.
Step-by-step explanation:
The statement is True. The exchange of carbon dioxide between the atmosphere and the surface of the ocean is a significant process in the carbon cycle. Carbon dioxide dissolves in ocean water and forms carbonic acid, which ionizes to carbonate and bicarbonate ions. This process helps regulate the amount of carbon dioxide in the atmosphere and influences the carbon content in both the atmosphere and oceans.