The process of accumulation of excess quantity of nutrients in water causing O2 deficiency is known as_____________________?
Correct answer: D. Eutrophication
- A. Sedimentation
- B. Nitrification
- C. Denitrification
- D. Eutrophication
Explanation
Eutrophication results from excess nutrients, especially nitrogen and phosphorus, stimulating algal growth; decomposition then consumes dissolved oxygen. Nitrification and denitrification are nitrogen transformations, not the overall nutrient-pollution process.
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