Answer:
Two in a whole and four in a pair. Six in a trio you see. Eight's a quartet but what you must get is the name that fits just one of me.
I make billions of dollars selling windows. Who am I?
I have lakes but no water forests but no trees and cities but no buildings. What am I?
I begin your sentences.
I'm the source of all emotion but I'm caged in a white prison.
Ripped from my ancestors home beaten and burned I become a bloodthirsty killer.