Question

Write three lines on volcano

Answer 1

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.....

Pressure builds in a volcano until the pressure must be expelled. The liquid and heat build up and force the lighter, melted rock buried deep below to the surface toward the surface of the Earth, causing an eruption.

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Answer 2

volcano is a mountain that has lava (hot, liquid rock) coming out from a magma chamber under the ground, or did have in the past.
Volcanoes are formed by the movement of tectonic plates.
The Earth's crust is broken into 17 major, rigid tectonic plates. These float on a hotter, softer layer in its mantle.

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