Answer:
The oceanic crust is forced under the continental crust and into the mantle. Crompression causes mountains to form on the continental crust. Material in the mantle melts as volatiles seep out of the oceanic crust. The molten material rises to the surface, forming a continental volcanic arc.
Explanation:
hey ur not stoopid it's just the teachers
Around 400 million years old
I'd say counties because there are way more of them
It disperses into the water creating ripples hope this helps!