The main hazard of an eruption that forms a large caldera is:

A) burning, building collapse, and suffocation from an eruption column and pyroclastic flows
B) volcanic mudflows and landslides
C) hot fragments thrown a short distance from the volcano
D) destruction by moderately fluid lava flows that can flow far from the volcano

Pyroclastic Flows

Fast-moving currents of hot gas and volcanic materials (such as ash) that flow down the sides of a volcano during an explosive eruption.

Eruption Column

A towering cloud of ash, gas, and volcanic debris that rises above a volcano during an explosive eruption.

Caldera

A large, bowl-shaped volcanic depression, formed by the collapse of land following a volcanic eruption or the emptying of a magma chamber.