Sagot :
Answer:
1 Pressure builds in the magma chambers, energy is
gained for an eruption. Expulsion of pressurized steam
takes place due to the heating up of water by the
magma inside the volcano.
Il Magma rich in dissolved gas fills the magma chamber
of the volcano, which can be tens of kilometers
underground, with temperatures up to more than
1,0000C.
III The magma chamber of the volcano empties, and
the walls of the conduit are weakened and collapse,
creating a crater or caldera.
IV Steam is seen rising from the volcano, as water
inside the volcano evaporates when in contact with hot
magma.
Explanation: