Why does volcanoes occur at mountainous regions?

It might seem so, but actually the opposite is the real reason, most volcanoes actually form the mountains. Age long eruptions gather at one point forms the mountains like Mt. Etna, Mt. Pinatubo, Mt.Vesuvius. read more

Volcanoes occur mostly in these boundaries. Where as mountains occur mostly in Convergent boundary. Most active volcanoes at present are not actually present in mountain regions, rather maximum volcanoes actually lie under the ocean. read more

In case oceanic plate moves above a plume it forms volcanic islands. Like hawaii. It is always forms in arc in descending way as plate keep on moving and islands are formed. And other wise when a continental plate moves it makes up same mountains as in islands but only difference is it’s in continental plate and makes volcano which are stable. read more

A: Volcanoes occur when magma from the earth's mantle reaches the surface. This can happen at the place where two tectonic plates diverge or converge. It can also occur in a place called a hotspot, in which magma from the mantle reaches the surface in the middle of a tectonic plate. read more