Question

question 7 (1 point) upwellings provide an important mixing mechanism for surface and deep waters that ______________. brings high levels of oxygen to the seafloor. all of the above brings cold, deep, highly saline nutrient - rich water to the surface. brings cold, shallow, nutrient - poor water to the deep.

Explanation:

Upwellings are oceanographic phenomena. They occur due to wind - driven processes. Cold, deep, highly saline nutrient - rich water is brought to the surface. This is because the wind blows surface water away, and deeper water rises to replace it. The deep water is rich in nutrients (like nitrates, phosphates) which are essential for marine life. Oxygen levels in deep water are not particularly high compared to surface water in many cases. Also, upwellings bring deep water to the surface, not shallow water to the deep.

Answer:

brings cold, deep, highly saline nutrient - rich water to the surface.