When an ocean current brings cold, nutrient-rich water to the surface, it is called a(n)

A) tide.
B) lake effect.
C) upwelling.
D) monsoon.
E) overturn.

Upwelling occurs when cold, nutrient-rich water rises to the surface due to the movement of ocean currents. This process is important for the growth of marine organisms and can affect weather patterns. Tides are the regular rise and fall of sea levels caused by gravitational forces, lake effect only occurs in inland bodies of water, monsoons are seasonal winds that bring heavy rains, and overturn refers to the mixing of warm and cold water in a body of water.