Solution:We all know this fact that about three fourth of the earth is covered by the hydrosphere.
We also know that a major portion of the Hydrosphere is covered by the ocean. The ocean floors are characterized by four relief zones - Continental Shelf, Continental Slope, Deep Sea Plain, and Oceanic deep or trench. Notably, besides, these divisions, there are also major and minor relief features in the ocean floors like ridges, hills, seamounts, guyots, trenches, canyons, etc.
