Complete the paragraph.
A volcano is a (). Volcanoes can erupt. During a volcanic eruption, melted rock () the ground.

 - fire below Earth's surface . . . turns solid below
 - hole in Earth's surface . . . comes out of
 - type of melted rock . . . flows into
A volcano is a hole in the ground. During a volcanic eruption, melted rock comes out of the ground through a volcano.