"Eutrophication" in a water body is primarily triggered by the excessive runoff of:

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A Industrial heavy metals like lead and mercury
B Fertilizers containing nitrates and phosphates
C Plastic micro-beads from domestic waste
D Oil spills from commercial transport ships

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Answer: B. Fertilizers containing nitrates and phosphates

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• Explanation: B is correct because nutrient overload fuels massive algal blooms, which deplete dissolved oxygen and suffocate aquatic life.

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"Eutrophication" in a water body is primarily triggered by the excessive runoff of:

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