There is a process that results in the feature ocean trench, what is the name of this process? explain the process in detail. be specific.

The process by which ocean floor sinks beneath a deep-ocean trench and back into the mantle. As subduction occurs, crust closer to a mid-ocean ridge moves away from the ridge and toward a deep-ocean trench.

the correct answer is:

a population changes in response to a change in the environment.