Question

what class of water pollution can cause excessive growth of algae in waterways, depleting dissolved oxygen as the algae decays?
pesticide pollution that cause significant mutations
heavy metal pollution such as mercury and cadmium
radioactive materials such as uranium and polonium
inorganic nutrients such as nitrogen and phosphorus

Explanation:

Excessive growth of algae, known as eutrophication, is caused by an over - abundance of inorganic nutrients like nitrogen and phosphorus in water. These nutrients act as fertilizers for algae, leading to their rapid growth. When the algae die and decay, they consume dissolved oxygen in the water.

Answer:

inorganic nutrients such as nitrogen and phosphorus