Question

Why is sunlight important to all aquatic ecosystems?

Pick a answer
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A. Sunlight allows fish to see their surroundings, even at depth.

B. All of the other answer choices

C. Aquatic producers need sunlight to make food and release oxygen.

D. Aquatic organisms cannot carry out life processes in the dark.

Answer 1

Sunlight stimulates the growth of phytoplanktons which belong to the first trophic level in an aquatic ecosystem pyramid. If these do not exist, aquatic ecosystem would also disappear.