Deep water rises along the coast of peru to replace surface water carried away from the coast by strong winds. why is upwelling important?

Upwelling is important to mix the nutrients that are present deep inside the water.Updewelling is a phenomenon in which the deeper water rises and gets mixed to the surface water to promote the growth of phytoplanktons and seaweeds as the water that is present deep inside is rich in nutrients.These phytoplanktons serve as as source  of energy for large fishes and other aquatic animals. As these large animals are higher in population and are an important part of food chain and they also provide food to different marine mammals ,sea birds.The deep water infuses  with costal water so to serve as a fuel for high productivity of marine ecosystem.

correct answer is a. and d.