【Science】

『✎Answer』

1. Volcano is a a vent in the crust of the earth or another planet or a moon from which usually molten or hot rock and steam issue
2. Cinder Cone Volcanoes,Composite Volcanoes(Stratovolcanoes),Shield Volcanoes.
3. the viscosity, or stickiness, of the magma. the amount of gas in the magma. the composition of the magma.