The "string family" refers to a group of musical instruments that produce sound through vibrating strings. This family includes instruments like the violin, viola, cello, and double bass. These instruments can be played by drawing a bow across the strings or plucking them with fingers, known as pizzicato. String instruments are commonly made from wood and metal, and they are essential in various music genres, including classical, jazz, and folk. The pitch of the sound produced depends on the string's length, thickness, and tension, allowing for a wide range of musical expression.