Final answer:
Broadcast communication refers to messages transmitted from one source to multiple recipients, including mediums like TV, radio, and online. The correct answer is option 1.
Step-by-step explanation:
The term that refers to messages moving from one point to many points is broadcast communication. Broadcast communication encompasses various mediums such as television, radio, and the Internet, where a signal or message is sent out from a single point and received by many. This is different from network communication which can be more interactive and not necessarily one-to-many, and radio communication which specifically refers to the use of radio waves for transmitting messages.