The emergence of rock-and-roll in the united states demonstrates

The emergence of rock-and-roll in the united states demonstrates that cultural patterns are subject to change.
When rock-and-roll music first appeared in America, it was considered rude and obscene, and ungodly. Prior to that period, very different types of music were listened to. However, as times changed, new musical genres were introduced, and rock-and-roll was one of them, with Elvis Presley and the others.