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A lake which is rich in organic waste may result in:

  1. A
    mortality of fish due to lack of oxygen
  2. B
    increased population of aquatic organisms due to minerals
  3. C
    drying of the lake due to algal bloom
  4. D
    increased population of fish due to lots of nutrients

Solution & Step-by-step Explanation

Organic waste increases BOD. As microbes decompose the waste, they consume oxygen, leading to a sharp decline in dissolved oxygen, which causes the mortality of fish.

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A lake which is rich in organic waste may result in:
A
mortality of fish due to lack of oxygen
B
increased population of aquatic organisms due to minerals
C
drying of the lake due to algal bloom
D
increased population of fish due to lots of nutrients

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