Answer:
Upwelling
Step-by-step explanation:
Upwelling is a phenomenon in oceanography in which wind causes cold water from the deep to move to the surface. When such occurs water rich in nutrient are pushed to the surface by the force of wind, such water are regarded as the world's most productive water because they aid production in phytoplankton and leads to the increase in population of grazing zooplankton on the surface water. It also helps in the movement of marine animals.