3 Factors in Volcanic Eruptions!

Question

What are the 3 factors that determine whether a volcanic eruption will be violent or not?

What role does each factor play?

Answer 1

The way a volcano erupts depends on the composition of the lava and athe amount of gas it contains.The thicker the lava or the higher the gas content,the more explosive will be the eruption.The level of pressure that forces magma up a pipe or vent to the surface also contributes to the vilolent eruption.

Answer 2

Gas and water, viscosity of the lava, volcano type (composite volcanoes are on subduction zones tend to be the most violent),