Which one among the following is a major relief feature in the Ocean floor?

Deep Sea Plain

The correct answer is Option (2) → Deep Sea Plain

The Deep Sea Plain, also known as the abyssal plain, is considered a major relief feature of the ocean floor because it is a vast, flat, and extensive region, covering approximately 40% of the ocean floor and representing the true ocean basin floor. It is one of the four primary divisions of the ocean floor, along with the continental shelf, continental slope, and oceanic trenches/deeps.