How does the Banjo change pitch?

The banjo changes pitch primarily through the tension and thickness of its strings, as well as the length of the vibrating portion of each string. Players can adjust pitch by tuning the strings tighter or looser, which modifies their tension. Additionally, pressing down on the strings along the fretboard shortens the vibrating length, raising the pitch of the note being played. Overall, these techniques allow for a versatile range of pitches in banjo performance.