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Natural Resources — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceNatural Resources1 Mark
MCQ
Run$-$off from fertilizer$-$rich crop$-$fields causes:
  • A
    Turbidity of water bodies.
  • B
    Precipitation of toxicants.
  • ✓
    Eutrophication of water bodies.
  • D
    Thermal pollution of water bodies.
✓

Answer

Correct option: C.
Eutrophication of water bodies.
Fertilizers run of from crop fields lead to accumulation of the chemicals in water bodies which results in algal blooms. These alagal blooms thus block the sunlight from penetrating into the aquatic bodies. The aquatic plants thus do not get sunlight to synthesize food and oxygen, thus causing Eutrophication.

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