Answer:
A trench is evidence of (3) Convergent plate boundary
Explanation:
Trenches are formed by subduction a geophysical process which involves the converging of two or more Earth's tectonic plates and the older denser plate is pushed beneath the lighter plate and deep into the mantle causing the seafloor and outermost crust to bend and form a steep V shaped depression.
Geological features which occur at convergent boundary are as following:
