Question

select the correct answer.
macy observes the lake near a park is covered in green slime. over a few days she sees that the fish in the lake have started dying. what could be a possible cause of this situation?
a. the acid level of the lake has increased.
b. an algal bloom has drained the lake of oxygen.
c. industrial chemicals have poisoned the lake.
d. the sediment level of the lake has increased.

Explanation:

Algal blooms (green slime) consume oxygen. Fish die without oxygen. Other options (acid, chemicals, sediment) don’t directly link to green slime and fish death as clearly as algal bloom oxygen - depletion.

Answer:

B. An algal bloom has drained the lake of oxygen.