system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:How is information attached to radio waves?

How is information attached to radio waves? Such as sound/music or text such as commands for computers?
gpt
Information is attached to radio waves by altering (modulating) their physical properties (amplitude and frequency). That's why there is FM (frequency modulated) and AM (amplitude modulated) radio.  

For example if you want to transmit the message 1101 you could define a "1" as a radio wave with a high amplitude and a "0" as one with a low amplitude. Now you create a radio wave whose amplitude goes high, high, low, high. Obviously you have to tell the receiver of the radio wave that a low amplitude means "0" and a high one means "1".