I believe is the it is a fact that serves as a supporting detail
Carrot
Eye
Overdo
Plane
Tail
I think it would be
Communism
Answer:
density is defined as the mass of a substance per unit volume, and is highly variable in crustal rocks. Rock density is a physical characteristic that is governed by the chemical composition (in situ minerals) and pore spaces of a specific rock or rock type.
Explanation:
It's to separate 2 independent clauses.