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______________ causes sun block and prevent from reaching lower waters.

(a) Algal blooms

(b) Plants

(c) Aquatic animals

(d) Algae

This question was addressed to me during an online exam.

Origin of the question is Wastewater Treatment Systems topic in division Bacterial Metabolism in Wastewater Treatment Systems of Environmental Biotechnology

1 Answer

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Best answer
Correct choice is (a) Algal blooms

Explanation: Phosphorus in water from runoff lands, or from leaching through soil from fertilizers and sewage discharges where the phosphorus content is too high, it can trigger algal blooms resulting in eutrophication which would eventually block the sunlight from reaching lower waters leading to the death of the plants, plants, aquatic animals do not block the sunlight, whereas, algae helps in photosynthesis.

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