Most of the volcanic activity occurs in the ring of fire is a result of the

Subduction Zones.

Explanation:

Subduction Zones are ultimately convergent plate boundaries. And when the heavier plate gets shoved under the lighter one, this results in most of the volcanic action you see. So where subduction zones are, is where you will most likely see volcanic activity. The Ring Of Fire is one example.

can you show the map , i'll be able to update my answer

answer; philosophy;