Answer:
c) A hot spot.
Explanation:
Igneous rocks form when magma cools and crystallizes, at volcanoes on the surface (extrusive) or under them (intrusive).
I would say that they are placed into families.
The perceptible natural movement of the air, especially in the form of a current of air blowing from a particular direction
A. the amount of <span>silica in the magma
Hope that helps.</span>