Please answer the following question: Fact 1: Plucking a string can cause that string to vibrate. Fact 2: When the strings on a guitar vibrate, they transmit their vibrations to the saddle. Given the two facts above, answer the question "What vibrates the saddle?" with the following options: - voltage - friction - nerves - heat energy - mechanical - plucking - energy - waves
A:
plucking