Many of the songs from ancient times through the Renaissance were built on existing melodies. Why might composers have chosen to borrow a melody that had already been created?

The military dictatorship inviolently reacted to the opposition of the maya, who demanded greater rights for their native population. the genocide inresulted from a struggle between arab nomadic tribes and non-arab agricultural groups. the tutsi were the victims of genocide inat the hands of the hutu rulers.