Question

which of the following statements best describes an extrusive igneous rock? a it only forms below earths surface. b it only forms above earths surface. c it can form either above or below earths surface. d below the earths crust.

Explanation:

Extrusive igneous rocks form when magma erupts onto Earth's surface (as lava) and cools quickly. In contrast, intrusive igneous rocks form below the surface. Option A describes intrusive rocks, option C is incorrect as extrusive rocks only form above ground, and option D is too vague and refers to subsurface formation.

Answer:

B. It only forms above Earth's surface.