A) epineuston
B) periphyton
C) zooplankton on the water surface
D) primary consumers in the depth of a pond
Correct Answer: D
Solution :
The term ?benthos? was earlier used for the animals found living on the sea bottom. Presently, however, it is used for describing the organisms of aquatic ecosystem which live associated with any substratum crawling or burrowing there) or attached to rocks.
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