The correct answer is Only 1, 2, 5 and 6. Explanation & Key Takeaways: Ocean Floor Divisions: • The an be divided into various parts such as Continental Shelf, Continental Slope, Continental Rise or Foot, Deep Ocean basins, Abyssal plains & Abyssal Hills, Oceanic Trenches, Seamounts and Guyots. Continental Shelf: • It is the submerged edge of a continent that is gently sloping plain. • It lies close to the continental margin. • Siberian Shelf in the Arctic Ocean is the largest continental shelf in the world. • It is made up of granite rock. Continental Slope: • It is the slope between the outer edge of the continental shelf and the deep ocean floor. • The steep-sided continental slope separates the continental shelf from the deep seafloor. • It has been considered as the area of termination of the continent. Deep Ocean Basins (between 4,000 and 6,000 m deep): • It is the lowest layer in the Ocean, which is covered by the sediments of basalt. • It is a flat, cold and sediment covered ocean floor. Oceanic deeps: • Ocean deeps or trenches are steep depressions in the deepest parts of the ocean. • Trenches are long, narrow depressions on the seafloor that form at the boundary of tectonic plates where one plate is pushed, or subducts, beneath another.