Question

In a pond, the pollution of water by human-made pollutants, such as oil and grease, can cause chemical, biological, and ecological changes. As plants begin to die and decompose, carbon dioxide is released. What would happen to the fish in the pond?
Responses
A the fish would thrivethe fish would thrive
B the fish would die offthe fish would die off
C the fish would not be affectedthe fish would not be affected
D the fish would move to another pondthe fish would move to another pond

Answer 1

B — the fish would die off.

Explanation: As plants decompose, microbial decomposition consumes dissolved oxygen in the water, reducing oxygen available to fish. Low dissolved oxygen (hypoxia) causes fish kills.