An aquatic ecosystem with maximum primary productivity is
A
Ocean
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B
Pond
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C
Estuary
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D
River
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Solution
The correct option is B River Primary productivity is the rate at which energy is converted by photosynthetic autotrophs to organic substances. It is the rate of energy obtained by photosynthesis. In aquatic ecosystem, the primary productivity is dependent on the availability of nutrients and light. An aquatic ecosystem with maximum primary productivity is river.