Correct Answer:
Option A - Deep Sea plains are gently sloping areas of the ocean basins. These are the flattert and Smoothest region of the world. It is an underwater plain on the deep ocean floor, usually found at depths between 3000 and 6000 m.
A. Deep Sea plains are gently sloping areas of the ocean basins. These are the flattert and Smoothest region of the world. It is an underwater plain on the deep ocean floor, usually found at depths between 3000 and 6000 m.