Question

A lake with an inflow of domestic sewage rich in organic waste may result in

• A. Drying of the lake vary soon due to algal bloom
• B. An increased growth of fishes due to lot of nutrients
• C. Death of fish due to lack of oxygen
• D. Increased population of aquatic food web organisms

Answer 1

Answer: (C)

Death of fish due to lack of oxygen

The nutrients present in domestic sewage added in a lake will cause the dense growth of microbes, The microbes use oxygen and may deoxygenate the water which may lead to the death of the fish.