Plucking a string can cause that string to vibrate.
How the sounds are made vibrating strings provide the sound in stringed instruments.
Plucking a string can cause sound to be made in stringed instruments.
Doing what can cause sound to be made in stringed instruments?
Options:
1) Movement
2) wind
3) striking
4) adding
5) playing
6) plucking
7) electrically
8) breaking