Paper 1 · People, Development and Environment
UGC NET December 2023 (14.12.2023) Shift-I
Which of the following pairs of elements is most important for the eutrophication process?
ACalcium-magnesium
BNitrogen-phosphorus ✓ Correct
CNickel-cobalt
DIron-copper
Correct answer: (B) Nitrogen-phosphorus — Nitrogen and phosphorus are most important for eutrophication, so the answer is nitrogen-phosphorus.
Explanation
★Nitrogen and phosphorus are most important for eutrophication, so the answer is nitrogen-phosphorus.
★Eutrophication is the over-enrichment of a water body with nutrients.
★Excess nitrogen and phosphorus trigger rapid growth of algae and plankton.
★This algal bloom blocks light and depletes oxygen as it decays.
★The oxygen loss harms fish and other aquatic life.
★The other element pairs are not the main drivers of this nutrient enrichment.
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