Pick your answer from:
1). voltage;
2). friction;
3). nerves;
4). heat energy;
5). mechanical;
6). plucking;
7). energy;
8). waves;
Given those answer options, answer the 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, what vibrates the saddle?
A:
6).