Final answer:
Ocean upwelling in South Africa brings deep water nutrients to the surface, enhancing photosynthesis and marine life.
Step-by-step explanation:
In South Africa, ocean upwelling brings cold water and nutrients to the surface when the prevailing winds push surface waters away from the coast. This process reintroduces nutrients from the deep ocean to the surface waters, which is critical for supporting marine life. When these nutrients are exposed to sunlight, they facilitate the process of photosynthesis, which greatly increases the amount of life present in these waters. Photosynthetic organisms, such as phytoplankton, form the basis of aquatic food webs and their growth is boosted by the abundance of nutrients provided by the upwelling.