What causes a volcanic eruption

Volcano eruptions happen when magma erupts from beneath the Earth's crust.

Explanation:

When a volcano erupts, the magma becomes lava and shoots into the air, eventually running down the side of the volcano.

within these regions are all the major types of biomes in the world. a biome is a community of animals and plants spreading over an extensive area with a relatively uniform climate. some diverse biomes represented in north america include desert, grassland, tundra, and coral reefs.