Eutrophication of water bodies is caused by the-
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A.
Excessive discharge of suspended solids
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B.
Excessive discharge of nutrients
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C.
Excessive discharge of chlorides
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D.
Discharge of toxic substance
Correct Answer:
B. Excessive discharge of nutrients
Explanation:
Eutrophication is primarily triggered by an overabundance of nutrients, specifically nitrogen and phosphorus, entering aquatic ecosystems. These nutrients often originate from agricultural runoff containing fertilizers, as well as industrial and municipal wastewater. This nutrient enrichment stimulates the rapid growth of algae and other aquatic plants, which eventually decompose and deplete the water's dissolved oxygen, leading to detrimental effects on fish and other marine life.
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