Question

Which of these is an effect of an algal bloom?

A. The mercury contained in fish build up in animals that eat the fish
B. An increased growth in microorganisms result in oxygen depletion
C. Materials containing metal are toxic to organisms that live in them
D. Bacteria are introduced to break down hydrocarbons in an oil spill

Answer 1

the answer is B. an increased growth in microorganisms results in oxygen depletion