Which roles does pressure play during a volcanic eruption? check all that apply. pressure decreases as magma rises. pressure traps dissolved gases in magma. pressure increases until the volcano explodes. pressure from rocks above causes new rocks to form. pressure from expanding gases forces magma through the pipe and vent.

The answers that apply are;

When magma rises from magma chambers deep in the crust, the pressure on the magma decreases because they are few and  fewer rocks above it. The gases are able to expand and apply enormous pressure on the rocks above. When the rocks give in to the pressure, the magma explodes upwards  throwing magma and rocks up in the atmosphere.

a

Explanation:

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