Algal blooms impart a distinct colour to water due to

Options

A. their pigments
B. excretion of coloured substances
C. formation of coloured chemicals in water facilitated by physiological degradation of algae
D. absorption of light by algal cell wall.

Answer

A

Explanation

Algal blooms are considered as pollutants of water, as they have very damaging effects on flora and fauna of that water body. The color imparted by them depends on the colour of major pigment in them. For e.g., chlorophyll imparts the characteristic green colour. Also refer to answer 19.