Counterculture: A subculture that rejects conventional social norms or values. In relation to rock & roll in the 1950s, it refers to young people rebelling against mainstream culture.
Radio Stations: Broadcast stations that transmit audio signals over radio waves for public listening. They played a crucial role in popularizing rock & roll by giving it widespread exposure.
Cultural Appropriation: The adoption, borrowing, or imitation of elements from one culture by members of another culture. In the case of rock & roll, it involved blending African-American musical influences with white artists' performances.