The green scum seen in the freshwater bodies is

Options

A. Blue green algae
B. Red algae
C. Green algae
D. Both (a) and (c)

Answer

D

Explanation

The green scum seen in the fresh water bodies is due to excessive growth of blue green algae and green algae in the presence of nitrates and phosphates called algal bloom and this results in oxygen insufficiency for aquatic organisms and this ageing of water is called eutrophication.