Invented by Adolphe Sax, which single-reed woodwind instrument is a staple of jazz music?

Saxophone

Adolphe Sax originally intended for the saxophone to bridge the gap between woodwinds and brass, combining the agility of a clarinet with the power of a trumpet. While it struggled to find a place in classical orchestras, its expressive, vocal-like quality made it the defining voice of the 20th-century jazz movement.