the instrument should have strings like a guitar or a violin
The highest instrument of the string family is the violin.
The highest instrument of the string family is the violin.
Strings.
String
the string family
It belongs to the string family.
the violin
It is the violin.
The mandolin is a stringed instrument.
The stringed bass/upright bass has the lowest register in the string family. The cello is also a bass string instrument, though it's not as low as the bass.
The Double Bass is a string instrument. Other instruments in the orchestral family of string instruments are the violin, viola and cello.
The harp is a solo string instrument, BUT it belongs to the percussion family in the orchestra, as it is used mostly for special effects.