Which structures on the ocean floor are equivalent to the mountains on land

The continental shelf, slope, and trenches are structures on the ocean floor are equivalent to the mountains on land.
Continental shelf is the landmass underwater. It extends from a continent and results in an area of  shallow water known as a shelf sea. The shelf brake, or the slope is the point where the continental shelf ends. 
The ocean trenches topographic features on the sea floor, formed when one tectonic plate slides beneath another.