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Second most important trophic level in a lake is

1. Zooplankton
2. Phytoplankton
3. Benthos
4. Neuston

Correct answer: Zooplankton

Solution

In a lake ecosystem, the second trophic level is occupied by primary consumers, which are zooplankton. They feed on phytoplankton, the primary producers at the first trophic level.

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