Final answer:
MTV, the network that debuted in 1981, changed the music industry by creating a new platform for music videos, influencing popular culture and media consumption.
Step-by-step explanation:
The cable television network that debuted in 1981 and revolutionized the music industry by featuring music videos and related content was MTV (Music Television). This innovative network changed the landscape of television and music by offering a new platform for artists to reach audiences, significantly influencing popular culture and the consumption of music. Prior to the rise of MTV, the television industry was primarily dominated by major networks like ABC, CBS, and NBC, along with educational networks like PBS. The introduction of MTV, alongside other cable networks, shifted advertising revenue streams and impacted how audiences interacted with media and entertainment.