Answer:
-The feature was most likely caused by one oceanic crust subducting under a leading edge of a continent.
-It is most likely a deep-ocean trench because they are common along the margins of the Pacific Ocean.
-It is most likely a deep-ocean trench because they are common along the active continental margins.
Step-by-step explanation:
Subduction is a geological process that leads to the creation of several geological features. It usually occurs when there is a movement of one plate against another plate that is caused by a high potential energy. This kind of geological processes usually occurs at regions known as subduction zones which has the highest crash events all over the world.