20. What type of music became MOST popular in the 1950s and 1960s? 21. Jazz has been called the most authentic American music. Where in the United States did jazz originate? 22. Which cities were considered the center of the beat movement? 23. Why did the emergence of rock 'n'roll in the 1950s.which rapidly became very popular?

20. The type of music that became most popular in the 1950s and 1960s was rock 'n' roll. This genre of music was characterized by a strong beat, simple melodies, and often featured themes of youth rebellion and romance.<br /><br />21. Jazz originated in the United States in New Orleans, Louisiana. The city's diverse cultural influences, including African, Caribbean, and European traditions, contributed to the development of jazz music.<br /><br />22. The cities considered the center of the beat movement were San Francisco, California, and New York City, New York. These cities were hubs of cultural and artistic activity during the 1950s and 1960s, and they played a significant role in the development of the beat movement.<br /><br />23. The emergence of rock 'n' roll in the 1950s rapidly became very popular because it resonated with the youth of the time. The music was rebellious, energetic, and reflected the changing social and cultural landscape of the era. Additionally, the rise of television and the music industry's marketing efforts helped to promote and popularize rock 'n' roll.