Volcanoes form after the overlying crust is ruptured by heated gases from a magma body; the resulting allows gases and lava to reach the Earth's surface.

vent

Explanation:

Vents are the fissures present on the surface of the earth (both at the land surface and sea bottom) that are produced when the hot gaseous materials including both liquid and gases are released into the atmosphere. For example, the hydrothermal vents located at the seafloor through which magma and hydrothermal gases are released.

The volcanoes are the distinct geological features that are formed on the earth's surface due to the rising up of magma, and it reaches the surface, it forms vents, through which the lava and the volcanic gases are released.

Magma

Explanation:

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