In what parts of a volcano do convection currents play a role?
A. In the crater and the vent
B. In the magma chamber and the vent
C. In the pyroclastic flow and the ash cloud
D. In the caldera and the fissures
A. In the crater and the vent
B. In the magma chamber and the vent
C. In the pyroclastic flow and the ash cloud
D. In the caldera and the fissures