Final answer:
The type of zone located at a deep-ocean trench is convergent. This occurs when two tectonic plates collide, resulting in subduction.
Step-by-step explanation:
The type of zone located at a deep-ocean trench is convergent. A convergent zone is where two tectonic plates collide, forcing one plate to move below the other in a process called subduction. This is exactly what happens at a deep-ocean trench, such as the Mariana Trench in the western Pacific Ocean.
Learn more about plate tectonics