Final answer:
Rock and Roll is the genre of music that combines elements of rhythm and blues and gospel music with emphasis on vocals and improvisatory delivery. It was popularized in the 1940s and 1950s and gave rise to various future musical genres.
Step-by-step explanation:
The kind of music that incorporates elements of rhythm and blues and gospel music, characterized by an emphasis on vocals and an impassioned improvisatory delivery, is known as Rock and Roll. Rock and Roll emerged in the 1940s and 1950s as a fusion of various musical styles, including gospel, blues, country, and jazz. The genre featured the use of electric instruments and was marked by its heavy rhythm, simple lyrics, and captivating melodies.
Influential artists such as Sister Rosetta Tharpe and Jackie Brantson, along with the contributions of disc jockey Alan Freed, helped propel the popularity of rock and roll among young audiences across the United States.
With its roots in African American communities, rock and roll represented a profound cultural expression that laid the groundwork for future musical genres, including soul, jazz, and even hip-hop.