Question

In general, how do most nutrients reach the mesopelagic and bathypelagic zones? 1, Nutrients sink into these zones from the epipelagic zone.
2. Nutrients diffuse into these zones from deeper water.
3. Nutrients are produced by phytoplankton living in these zones.
4.Nutrients are produced by zooplankton living in these zones

Answer 1

The answer is; 1

Most of the photosynthetic organisms are located in the epipelagic zone of the oceans where sunlight can penetrate before diffusing and becoming too weak to support photosynthesis. The epipelagic zone is filled with plankton. When this plantkon die, they begin to sink slowly to the bottom of the ocean. These plankton are food for small fish. These small fish are food for bigger fishes. This is how an ecosystem is sustained in the deep dark oceans.