Question

what geological process leads to the formation of igneous rock?
a melting
b sedimentation
c erosion
d weathering

Explanation:

Igneous rocks are formed from the cooling and solidification of molten rock (magma or lava). Melting is part of the cycle that can lead to the formation of magma which then cools to form igneous rocks. Sedimentation forms sedimentary rocks, erosion is the wearing - away of rocks and weathering breaks down rocks in place.

Answer:

A. melting