Question

what is the term for the process where deep, cold, nutrient - rich water rises to the surface? primary production overturning stratification upwelling

Explanation:

Upwelling is the process where deep - cold, nutrient - rich water rises to the surface. Primary production refers to the creation of organic compounds from inorganic substances by autotrophs. Overturning is a more general term for water masses changing position in a non - specific nutrient - rich up - rising way. Stratification is the layering of water bodies based on density differences.

Answer:

D. Upwelling