Fact 1: Melting is when solids are heated above their melting point.

Fact 2: Igneous rocks form when rocks are heated to the melting point which forms magma.

Given the two facts above, answer the question "What do igneous rocks form into when heated?" with the following options: 
- magma
 - matter
 - crust
 - soils
 - rocks
 - alveoli
 - coal
 - mines


 

 magma        