Here's a breakdown:

* Volcanoes are formed when molten rock (magma) from deep within the Earth's crust rises to the surface.

* This magma, when it reaches the surface, is called lava.

* As the lava cools and solidifies, it builds up over time, creating the cone-shaped structure we recognize as a volcano.

* Ash is also released during volcanic eruptions, which can contribute to the mountain's formation.

Volcanoes are fascinating features of the Earth's landscape and play a significant role in shaping our planet.