When you tune a radio to a particular station, what are you actually adjusting?

1. Each station broadcasts at its own frequency, which acts as a driving frequency on the receiver. 2. Tuning shifts the resonant frequency of the receiver until it matches the wanted station. 3. At that setting the receiver responds strongly to that station and weakly to all the others. 4. The transmitter is far away and cannot be adjusted from the radio, so that option is impossible. 5. Damping fixes how sharply the radio separates neighbouring stations, but it is not what the tuning knob is aimed at. _Source: OpenStax College Physics (CC BY 4.0), Ch 16 "Oscillatory Motion and Waves", section 16.8 Forced Oscillations and Resonance_