Final answer:
The assigned frequency or frequencies used to carry voice and/or data communications is Frequency.
Step-by-step explanation:
The assigned frequency or frequencies used to carry voice and/or data communications is 2) Frequency. In AM radio transmission, the amplitude of the wave is modulated, while in FM radio transmission, the frequency of the wave is modulated to carry the information. Each station is assigned a specific carrier frequency that allows for the transmission of the desired information.