Biology

Crawford

20 July, 19:48

Which abiotic factor is essential to all aquatic ecosystems except ocean hydrothermal vents, and why?

A. Phytoplankton, because it provides a source of minerals

B. Salt, because it provides a source of materials

C. Deep water, because it provides the necessary environment for organisms to move about

D. Sunlight, because it provides a source of energy

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