Answer:
In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. A crystal structure is composed of a unit cell, a set of atoms arranged in a particular way; which is periodically repeated in three dimensions on a lattice.
Explanation:
Fairly sure we go to the same hs but I put A. It might be c though. Not totally sure.
Its the sun duhh (hear sourse)
Fold mountains occur on Collison zone plate boundaries, where two continental plates collide with each other, causing them to rise up
