The bottom of the ocean is part of a tectonic plate or continental shelf, or can be on the breach line between two shelves.
yes
both
The Young Ocean Floor is the part of the mantle showing between the 2 split tectonic plates.
sea floor
Along constructive/divergent plate boundaries. This is where the new ocean floor comes from. This is the youngest part of the ocean floor that is.
The crust contains the ocean floor and also the continents on Earth.
reef
Continental Shelf.
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.
the abyssal plain
Mid- ocean ridge is the part of the continuous underwater mountain range that circles earth.
The Marianas trench .