Answer:
Option (3)
Step-by-step explanation:
The Northwestern part of Pacific ocean shares a convergent plate boundary with the North American plate, as a result of which subduction zone is formed and there occurs a trench. The denser Pacific plate sinks due to the slab pull effect and it also leads to the formation of mountains. This type of collision generates deep-focus earthquakes.
it is not associated with the oceanic ridge as the mid-oceanic ridge forms in a divergent plate boundary.
Thus, the correct answer is option (3).