Question

multiple choice question although oxygen content generally decreases with increasing depth in the ocean, a reverse in the trend occurs around 800 meters. why? there are a lot more photosynthesizing organisms at depth there is a significant drop in the number of animals that are using oxygen oxygen gas bubbles up from the oceanic crust

Explanation:

Photosynthetic organisms produce oxygen. As depth increases in the ocean, light availability decreases which limits photosynthesis. Around 800 meters, there is a significant drop - off in photosynthesizing organisms, leading to a decrease in oxygen production and thus a reverse in the oxygen - depth trend.

Answer:

There are a lot more photosynthesizing organisms at shallower depths.