Multiple choice

Eutrophication is caused by excessive quantities of chemicals, which get washed from fields. These act as nutrients for algae to flourish. Due to eutrophication, ______________.

  1. the biological oxygen demand decreases

  2. the growth of algae is retarded

  3. water becomes useful

  4. the biological oxygen demand increases

  5. no change in biological oxygen demand

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Due to eutrophication, biological oxygen demand increases.