I believe that would be the fault line.
Hope it helps!
What Is Geography?
Geography is the spatial study of the earth's surface (from the Greek geo, which means “Earth,” and graphein, which means “to write”). Geographers study the earth's physical characteristics, its inhabitants and cultures, phenomena such as climate, and the earth's place within the universe.
Well all living organisms require oxygen to survive, and all bodies of water on this planet are usually heavily oxygenated, which im guessing is where the underwater plants get all their nutrients from. hope this helps!
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