Question

What do you understand by volcano?

Answer 1

Answer:a volcano is an opening in the earth's crust, filled with molten magma called lava.

Explanation:

Answer 2

Explanation:

A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. Earth's volcanoes occur because its crust is broken into 17 major, rigid tectonic plates that float on a hotter, softer layer in its mantle.