Question

Volcanic eruptions are caused by? A gravity. B Pressure C Explosions D earths rotation please help

Answer 1

Answer:

I'm pretty sure it's B, pressure.

Explanation:

I hope this helped :)

Answer 2

Answer:

Although there are several factors triggering a volcanic eruption, three predominate: the buoyancy of the magma, the pressure from the exsolved gases in the magma and the injection of a new batch of magma into an already filled magma chamber. ... This lighter magma then rises toward the surface by virtue of its buoyancy.