human
Question: One effect of ocean pollution is that it can reduce populations of phytoplankton and algae. The reduction of these populations might have which impact on an ecosystem?

Choices:
A) decreasing the level of carbon dioxide in the atmosphere
B) decreasing the amount of oxygen being produced
C) increasing the amount of marine sediments
D) increasing salt-water fish populations
gpt
The correct answer is 1: decreasing the amount of oxygen being produced.