Question

What kind of tectonic plate movement causes a trench?

Answer 1

When both plates are squeezing together.

Step-by-Step Explanation:

Plate #1 ----><---- Plate #2

Answer 2

In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.

Step-by-step explanation: