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Which of these statements describes an accurate explanation for how carbon dioxide and oxygen levels change within the ocean over time?


Photosynthesis by the phytoplankton increase the oxygen concentration of the ocean

Cellular respiration by primary consumers increases the oxygen concentration in the ocean

Eutrophication of the ocean leads to an increase in dissolved oxygen

Anaerobic respiration at the ocean floor decreases the carbon dioxide levels in the ocean

Answer :

Photosynthesis by the plankton