The correct option is 2 only.
Explanation
The continental slope is a major relief feature of the ocean floor, marking the steep transition zone between the shallow continental shelf and the deep ocean floor (continental rise or abyssal plain).
- Statement 1 is Incorrect: The continental slope connects the continental shelf and the continental rise. The standard sequence of ocean bottom relief from the coast is: Continental Shelf → Continental Slope → Continental Rise → Deep Sea Plain (Abyssal Plain). Mid-oceanic ridges are located in the central parts of ocean basins and are not directly connected to the continental slope.
- Statement 2 is Correct: The continental slope is characterized by a distinct increase in steepness compared to the gently sloping continental shelf. The gradient of the slope region typically varies between 2° and 5°.
- Statement 3 is Incorrect: The continental slope is not devoid of relief features. Submarine canyons-deep valleys often resembling the Grand Canyon-are frequently observed cutting across the continental slope. Furthermore, at active continental margins, the slope may descend directly into a deep-sea trench.
Key Takeaway: The continental slope is the steep edge of the continent (gradient 2°-5°) connecting the shelf to the rise, and it often features significant submarine canyons.