Which of the following describes a landslide?

What quick change is an opening in the earth's surface from which lava flows?

Which of the following is a quick change?

Read the statement below:

An earthquake is the shaking of the Earth’s surface. An earthquake can cause cracks to form in the ground. Houses and buildings can fall down and be destroyed.

This statement describes what quick change?

What landform is between mountains and can be in the shape of a U or a V?