Question

question 5 (1 point)
what causes downwelling?
convergence of surface currents
el niño moving south and mixing surface waters
cold - core ring rotations downward
marine life going to the bottom of the ocean to find food

Explanation:

Downwelling is the process of surface water sinking. When surface currents converge (come together), the water has nowhere to go but down, causing downwelling. El Niño is a climate pattern and not a direct cause of downwelling. Cold - core ring rotations are more related to local ocean eddy dynamics and not the main cause of large - scale downwelling. Marine life going to the bottom is a biological behavior and not a physical process that causes downwelling.

Answer:

Convergence of surface currents