Respuesta :
B) Abyssal plain is used to describe the deep and flat portions of the ocean on either side of a mid-ocean ridge.
The term used to describe the deep and flat portions of the ocean on either side of a mid-ocean ridge is Abyssal Plain.
An Abyssal plain is a plain portion of land under water, at 10,000 to 20,000 feet deep.
The other options are not correct because two of them make reference to elevations of land inside water (seamount and Guyot) and the other one is the union between two plates (Trench)