- Radio station broadcasting is a source of radio waves
- A source of something emits that something
- Hence, radio station broadcasting emits radio waves

- Radio station broadcasting emits radio waves
- Radio transmitter emits radio waves
- So, radio station is a radio transmitter

Hence, radio station is a radio transmitter
[Question]Which of the following identifies the primary function of a radio station tower in a communication system?
[Context]- Radio transmitter emits radio waves 
- Radio station broadcasting is a source of radio waves 
- A source of something emits that something