Question

What causes ocean trenches?

Answer 1

Answer:

Plate tectonics

Explanation:

Plate tectonics is the movement of the Earth's lithosphere. Ocean trenches are formed in the subduction zone as the denser oceanic plate is subjected under the continental plate.

Answer 2

Ocean trenches are a result of tectonic activity, which describes the movement of the Earth's lithosphere. ... At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench