Question

what is upwelling? the rising of deep, nutrient - rich water to the surface the sinking of cold, dense water in polar regions the movement of warm water toward the poles the mixing of surface water due to tides

Explanation:

Upwelling is a process where deep - seated, nutrient - laden water rises to the ocean surface. This occurs due to wind patterns and the Earth's rotation, bringing nutrients that support marine life.

Answer:

The rising of deep, nutrient - rich water to the surface