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Question

Which function as direct or indirect food of all marine creatures

A
Protozoans
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B
Fish
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C
Aquatics insect
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D
Phytoplankton
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Solution

The correct option is D Phytoplankton
Phytoplankton are the foundation of the aquatic food web, the primary producers, feeding everything from microscopic, animal-like zooplankton to multi-ton whales. Small fish and invertebrates also graze on the plant-like organisms, and then those smaller animals are eaten by bigger ones.

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