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Volcanoes happen when

A seafloor spreading travels to the continents.
B erosion exposes magma.
C destructive forces explode.
O tectonic plates collide.

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Final answer:

Volcanoes happen when destructive forces explode and tectonic plates collide, causing magma to rise to the surface and erupt.


Step-by-step explanation:

Volcanoes happen when destructive forces explode. Tectonic plates collide and create immense pressure, causing hot molten rock called magma to rise to the surface. This magma may erupt through a vent or fissure in the Earth's crust, releasing gases, ash, and lava.


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