For you, what is the origin of things like a volcano?

The word volcano is derived from the name of Vulcano, a volcanic island in the Aeolian Islands of Italy whose name in turn comes from Vulcan, the god of fire in Roman mythology.

How volcanoes are formed?

-When rock from the mantle melts, moves to the surface through the crust, and releases pent-up gases, volcanoes erupt. Extremely high temperature and pressure cause the rock to melt and become liquid rock or magma. When a large body of magma has formed, it rises thorugh the denser rock layers toward Earth's surface.

answeramicable; (friendly);

i'm sure the answer you are looking for would be

a. an ice age

hope this contact me if this didn't or you need with more answers : )