Question

When does any material flow?
Which materials come out of a during a volcanic eruptions?
In which state of matter are these materials?
Are these materials cool or hot ?why?
What happened exactly when it flows?
Which animalies is in the material is responsible for the intiation of the flow?

Answer 1

Any material flow when it is in a molten or liquid state,during a volcanic eruption lava flows out,these materials are in aqueous state ,these materials are hot due to the high heat and pressure,