Question

Why are so many volcanoes found on the ring of fire around the margin of the pacific ocean?

Answer 1

the oceanic plates beneath lighter Continental plates, also because of the location of most of the Earth's sebduction zones.  

Answer 2

Answer:

The Ring of Fire runs along the borders of the Pacific ocean.

Explanation:

The Ring of Fire is also known as the Circum-Pacific Belt. It is a line of volcanos (and subsequent earthquakes) that surrounds the Pacific Ocean; this is where the majority of earthquakes and volcanic eruptions on Earth occur.