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Upper part of sea/aquatic ecosystem contains 

(a) plankton 

(b) nekton 

(c) plankton and nekton 

(d) benthos.

1 Answer

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Best answer

Correct option: (a) plankton

Explanation:

Planktons are passively floating in upper water, nektons are actively swimming while benthos lead sedentary life upon the sea bottom. Planktons are producers and are present in large number.

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