Question

_____ signals are used to transmit data and voice within the
line of sight through air or space.
​

Answer 1

Answer:

Radio waves...

Explanation:

Radio is the transmission of signals through free space by modulation of electromagnetic waves with frequencies below those of visible light. Inradio wave transmission, certain radio frequencies are allocated to private/government organizations for direct voice communications....

helps u....

Answer 2

Answer:

transmission medium signals are