Final answer:
The uppermost layer of the continental shelf that extends from the surface down to 200 ft. is the neritic zone. This zone is characterized by clear water, the ability for photosynthesis to occur, and a diverse range of sea life.
Step-by-step explanation:
The uppermost layer of the continental shelf that extends from the surface down to 200 ft. is the neritic zone. This zone lies between the intertidal zone and the edge of the continental shelf, and it is characterized by clear water, the ability for photosynthesis to occur, and a diverse range of sea life.
Phytoplankton, zooplankton, small fishes, and shrimp are commonly found in this zone, forming the base of the food chain for many world fisheries.