Excess nitrogen can lead to algal blooms and the death of fish. Which characteristic of nitrogen causes this problem?

A. Nitrogen is essential for growth in producers.

B. Nitrogen is essential for the salinity of water.

C. Nitrogen causes acid to form in water.

D. Nitrogen buffers cells from extremes in pH.

The correct answer is option A.

A marine bloom or an algal bloom refer to a brisk enhancement in the population of algae in an aquatic system. It can take place in freshwater as well as in marine environments.

Some of the algal blooms are the outcomes of an excess of nutrients mainly the nitrogen into water bodies, and higher amount of these nutrients in water results in increased growth of green plants and algae.

Nitrogen is a basic necessity for the growth of these organisms also known as producers, thus, this excess nitrogen level leads to more growth of these species resulting into a phenomenon known as algal bloom.

A) Nitrogen is essential for growth in producers.