Question

how are extrusive and intrusive igneous rocks formed​

Answer 1

Answer:

The two main categories of igneous rocks are extrusive and intrusive. Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet.

Answer 2

Extrusive igneous rocks are formed on the surface of the earth from lava.

AND

Intrusive igneous rocks are formed from magma that cool and solidifies with the crust of the planet..