an increase in fisheries production during upwelling a decrease in larval fish populations during upwelling an increase in algae and phytoplankton during upwelling a decrease in surface water temperatures during upwelling
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of the following events along the west coast of the United States provides direct evidence that upwelling brings nutrient-rich waters to the surface?
Possibilities:
- an increase in fisheries production during upwelling
- a decrease in larval fish populations during upwelling
- an increase in algae and phytoplankton during upwelling
- a decrease in surface water temperatures during upwelling

an increase in algae and phytoplankton during upwelling