Answer the following question given this paragraph: 

During a massive eruption all of the material may be ejected from a magma changer. Without support, the mountain above the empty chamber may collapse. This produces a huge caldera . Calderas are generally round, bowl-shaped formations like the picture in Figure below .


Q: After a massive eruption what will a mountain collapsing above an empty chamber create?

 Choices:

- crater

- cavern

- valley

- caldera

A:
caldera
