String instruments are musical devices that produce sound through vibrating strings. These instruments can be played by plucking, bowing, or striking the strings. Common examples include the violin, guitar, and cello. Each string can be tuned to different pitches, allowing musicians to create a wide range of melodies and harmonies. The sound of string instruments is often warm and rich, making them popular in various music genres, from classical to folk. Many string instruments have a hollow body, which amplifies the sound produced by the vibrating strings. This unique quality makes them essential in orchestras and bands around the world.