Multiple Choice Questions
Eutrophication of water bodies leading to killing of fishes is mainly due to nonavailability of.

Food

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Light

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Essential minerals

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Oxygen

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Solution

The correct option is D Oxygen
Eutrophication is the nutrient enrichment of a water body due to natural or accelerated/cultural factors like run-offs from land that causes the growth of plant life(algae) in it. These algae uptake the oxygen dissolved in the water making it unavailable and leading to the death of fishes, whose decomposing remains further deplete the water body of dissolved oxygen.
So, the correct option is ' oxygen'.

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