the continental Margin, Ocean Basin Floor and Mid-Ocean ridge :D
Trench
fissure
butt
The abyssal zone is the region of the deep ocean that is just above and on the ocean floor.
The continental shelf layer is called the shelf break. It is the steepest part of the continental shelf where the seafloor drops off sharply towards the deeper ocean floor.
The abyssal zone is the region of the deep ocean that is just above and on the ocean floor.
The flat part of the ocean floor is called the abyssal plain. It is a smooth, flat region that lies between the continental rise and the mid-ocean ridges.
Almost all the oceans have sheer drops and rather flat areas so one isn't inherently steeper then another. however the largest and steepest drop would most likely be in the Mariana trench, more specifically the challenger deep the deepest part of the trench, it is effectively a 90 degree drop nearly 7 miles deep. This trench is located in the Pacific ocean so that would have to be my answer
which landforms are on the ocean floor
The topography of the ocean floor
The ocean floor is not smooth.The ocean floor is made up of rocks, ledges and ditches.