Question

a volcano that appears to be a large sunken depression is a ______.
a. caldera
b. lava dome
c. tephra
d. tsunami

Explanation:

• A caldera is a large, roughly circular depression formed by the collapse of a volcano.
• A lava dome is a mound-shaped protrusion resulting from the slow extrusion of viscous lava.
• Tephra refers to fragments of rock and ash erupted from a volcano.
• A tsunami is a series of ocean waves caused by underwater disturbances like earthquakes or volcanic eruptions.

Answer:

A. caldera