Question

How do ocean floor features such as trenches and mid-ocean ridges form?

Answer 1

Plate tectonics

Step-by-step explanation:

The features of the ocean floor are formed by plate tectonics: converging plates, diverging plates, and subduction.

Answer 2

A mid-ocean ridge  is an underwater mountain range, formed by plate tectonics. This uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the ocean crust and create magma where two tectonic plates meet at a divergent boundary