Answer: Many photosynthetic organisms and large amounts of light.
Step-by-step explanation:
The surface layer of the ocean consists of epipelagic zone. This zone extends from the surface to 200 meters. This zone receives maximum sunlight. As a result of this it favors the process of photosynthesis of the plants. Hence, the diversity of plants is more in this zone also this will favor the survival of the zooplanktons and animals which are dependent on plants for their food requirements.