Question

granite originates ______.
by erosion of other rocks
in the \throat\ of a volcano
by solidification of subsurface magma
by solidification of surface magma

Explanation:

Granite is an intrusive igneous rock. It forms when magma cools and solidifies slowly beneath the Earth's surface. Erosion creates sedimentary rocks, not granite. Magma at the surface forms extrusive igneous rocks, and magma in a volcano's throat forms volcanic plugs, not granite.

Answer:

by solidification of subsurface magma