Excessive accumulation of Nitrogen and Phosphorous in the water helps in growth of which of the following?

a. Phytoplankton
b. Zooplankton
c. Fish

Only a

The correct answer is Option (1) - Only a

First option i.e. Phytoplankton is correct. Phosphorus stimulates the growth of algae in slow-moving water. These algae eventually die and decompose, removing the oxygen from the water. This process is called eutrophication which leads to killing of fish and other fauna.