Final answer:
A disk jockey or DJ is a person who plays recorded music for an audience, traditionally on the radio as a broadcaster but now also at events and clubs.
Step-by-step explanation:
The term “disk jockey”, commonly abbreviated as DJ, refers to a person who selects and plays recorded music for an audience. The correct answer to the question is b. A radio broadcaster. Traditionally, a disk jockey was someone who played music on the radio, introducing songs and interacting with listeners, but the role has expanded over time to include DJs who perform at clubs, parties, and various events. Modern DJs may also mix tracks, create music, and manage playlists to suit the preferences of their audience or the theme of the event they are playing at.