he major relief features of ocean floor are:
Continental Shelf: are areas of shallow water bordering the continents
Continental Slope: The slope leading from the outer edge of the continental shelf to the deep ocean bed.
Ocean deep: Are very deep trenches in the floor of the ocean, which forms long, arrow and trough-like depressions with relatively steep sides.
Deep Sea Plain: Is wide, gently undulating and fairly level area, which covers greater portion of the ocean floor.