Question

Runoff of fertilizers into lakes leads to:

• A. Drying of the lakes.
• B. Increased production of fish due to a lot of nutrients.
• C. Death of fish due to lack of oxygen.
• D. Production of oxides of nitrogen in water.

Answer 1

The correct option is C

Death of fish due to lack of oxygen.

Fertilisers that are used in the fields are washed into the lakes and ponds by rains. This leads to faster growth of bacteria which consumes a lot of oxygen in the water resulting in the death of fishes and other water animals.