A) Oligotrophic
B) Eutrophic
C) Lithotrophic
D) Agroecotrophic
Correct Answer: B
Solution :
Eutrophication means nutrient enrichment. Rich growth of micro-organism consumes most of the dissolved oxygen, so as to depreve, other organism. It generally occurs at the bottom layers of deep lakes. Eutrophication^ is harmful to fish and other aquatic life. Oligotrophic means less amount of nutrient.
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