What part of the wind instrument vibrates and amplifies waves of air?

In wind instruments, it is the air column inside the instrument that vibrates and amplifies waves of air. The vibration is typically initiated by a reed or a mouthpiece, which causes the air to oscillate. This oscillation creates sound waves that resonate within the body of the instrument, producing the musical tone. The shape and material of the instrument further influence the quality and pitch of the sound.