Answer:
Intrusive rocks are derived from magma while extrusive rocks are derived from lava.
Step-by-step explanation:
Intrusive rocks are formed when the magma cools down inside the Earth. Extrusive rocks are formed when lava cools down on the surface of earth. So, the characteristics best identify differences between intrusive and extrusive rocks is that intrusive rocks are derived from magma while extrusive rocks are derived from lava.