When consuelo struck a tuning fork and held it close to a string on a guitar the string began to vibrate on its own and make a sound which statement best explains why the string vibrated without anyone touching it

It has to do with vibrations being able to travel through the air when the tuning fork was struck the vibrations made the air around it vibrate as well and when the vibrating fork got near the string the vibrating air made the string vibrate as well.