How are igneous rocks formed?
A. Lava or magma cools and then crystallizes.
B. Glaciers melt.
C. Lava or magma heats up and crystallizes.
D. Hail falls and melts.

Respuesta :

A. Lava or magma cools and then crystallizes

This is the answer because when magma cools, it hardens and isnt in liquid form