Question

What is the reason for the reduction in dissolved oxygen?

• A. Bio-magnification
• B. Eutrophication
• C. Extinction
• D. Pollution

Answer 1

Answer:

B. Eutrophication

• The excessive richness of nutrients (phosphorus, nitrates, and detergents) in a lake or other body of water that leads to acceleration in the growth of algae and the natural aging of the lake is known as eutrophication.

• Excess algal growth deoxygenates water and reduces the dissolved oxygen content.