Why do areas of upwelling tend to have large and diverse populations of organisms?
A) Upwelling moves dinoflagellates to the aphotic zone.
B) Upwelling brings nutrient-rich water up from the ocean depths.
C) Upwelling brings aphotic organisms to the ocean surface.
D) Upwelling lowers the level of oxygen in the water.
E) Upwelling mixes deep-ocean fresh water with salt water from rivers.
B
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Fill in the blank(s) with correct word
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