Final answer:
Local television stations that broadcast national network programming are known as affiliates; they have agreements to air network's content and may also include local news and emergency updates.
Step-by-step explanation:
Local television stations like WSIX in Nashville, WDEF in Chattanooga, and WGNX in Atlanta that broadcast programming from national television networks are known as affiliates. These affiliates have agreements with national networks, such as CBS, to prioritize and air their network news and programming.
For instance, CBS affiliates would show popular network shows according to the national schedule but can break into local programming for emergencies or significant local events. While most programming is produced by television production companies, it's the network's role to distribute these shows to their affiliates, who then air them to a local audience.
These affiliates typically show local news before or after national network programming to keep the local viewers informed on nearby events, contrasting with the national and international focus of network news.