Describe the distribution of oxygen in the ocean from the surface to the deep sea
Oxygen is very unevenly distributed in the ocean. At the surface, oxygen readily diffuses into the ocean water from the atmosphere. In addition, photosynthesis activity by phytoplankton and other plants and algae releases oxygen. Therefore, the shallow waters of photic zone are rich in oxygen. Oxygen concentration decreases below the sunlit layer because of the respiration of marine animals and bacteria, and because of the oxygen consumed by the decay
of tiny dead organisms slowly sinking through the area. In the deep sea, oxygen levels increase slightly because deep sea water is carried from the surface by deep water currents that originated in the cold, oxygenated surface water of the poles. Additionally, fewer animals are present in the deep seawater to take up oxygen reaching these depths.
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The continental rise is located ________
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