Question

Eutrophication means ________

• A. excessive richness of nutrients in a water body
• B. decrease in growth of algae
• C. increase in fertility of soil
• D. all the above

Answer 1

The correct option is A excessive richness of nutrients in a water body

Addition of phosphates and nitrates/fertilizers into water leads to nutrient enrichment which is also called as eutrophication.
This is a kind of water pollution, because excessive nutrients result in growth of plants and algae over water surface which consume oxygen present and obstructs the light from entering the water.