What is a radio who ever answers first and correct i will mark brainlieast amd 100 points​

Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). ... The noun radio is also used to mean a broadcast radio receiver.

The lowest frequency portion of the electromagnetic spectrum is designated as “radio,” generally considered to have wavelengths within 1 millimeter to 100 kilometers or frequencies within 300 GHz to 3 kHz. There is a wide range of subcategories contained within radio including AM and FM radio.

Radio as in the device radio? If so, it is a machine that receives electromagnetic waves that can be translated to sound waves that we can hear.

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