Question

Eutrophication leads to death of fish due to

• A. Increased O${}_2$ content
• B. Increased algae content
• C. Decreased algae content
• D. Decreased O${}_2$ content

Answer 1

The correct option is D Decreased O${}_2$ content

Eutrophication is a condition where the excessive richness in the environment leads to overgrowth of the plants in the water bodies. As the lakes fertility increases, algal bloom occurs. Algal bloom causes the reduction of dissolved oxygen and fish mortality and dead remains begin to deposit at the bottom.

Thus, the correct answer is option D.