The biggest mountain range in the world is found under the Atlantic Ocean and is called the MidAtlantic Ridge. New crust is found along the ridge. The mid Atlantic ridge is along a divergent boundary where plates are moving

The blank is "apart."

Explanation:

Mid-ocean ridges are geologically important because they occur along the kind of plate boundary where a new ocean floor is created as the plates spread apart. Thus the mid-ocean ridge is also known as a "spreading center" or a "divergent plate boundary." The plates spread apart at rates of 1 cm to 20 cm per year.

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the answer is d (apex) good luck : ))

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."