the size of the guitar. the metal on the guitar. the wood on the guitar. the vibrations of the string.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: When a guitar string is plucked, sound is produced by
Possibilities:
- the size of the guitar.
- the metal on the guitar.
- the wood on the guitar.
- the vibrations of the string.

the vibrations of the string.