How does carbon move between different sinks and sources on earth

Carbon is constantly moving between these different stores, that act as either “sinks” or “sources.” A sink absorbs more carbon than it gives off, while a source emits more than it absorbs. The amount of carbon in the atmosphere at any one time depends on the balance that exists between the sinks and sources.

Explanation:

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above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.