Question

high volume, explosive eruptions may cause a volcano to subside or collapse into the now - empty magma chamber, producing a broad depression termed a _______.
o caldera
o fissure
o lahar
o crater

Explanation:

A caldera is a large, broad - depression formed when a volcano subsides or collapses into an empty magma chamber after high - volume, explosive eruptions. A fissure is a crack in the earth's surface, a lahar is a volcanic mudflow, and a crater is a smaller, bowl - shaped depression at the top of a volcano.

Answer:

A. caldera