Which type of rock forms as a result of cooling and crystallization?
a. igneous
b . classic
c . metamorphic
d. sedimentary

Igneous rock is the type of rock that forms as a result of cooling an crystallization

Explanation:

Rocks are either sedimentary, igneous or metamorphic based on the chemical composition and the mode of formation.Igneous rocks are formed as a result of the cooling and crystallization of magma from volcanic eruptions. Igneous rocks are either intrusive, which form deep in the crust or extrusive which form on the surface of the earth.Sedimentary rocks are formed as a result of deposition, and cementation of sediments.Metamorphic rocks, on the other hand, are formed from the sedimentary and igneous rocks during the rock cycle.

Ions gain or lose electrons