Answer:
Brass.
Explanation:
Wind instruments can be divided into two categories: wood and metal. However, it is the form of sound production that determines its classification and not the constructive material of the instrument. They are the horns, trumpets, trombones, tubas, saxophones and euphoniums.
This category includes wind instruments that produce sound by direct vibration of the performer's lips on a metal mouthpiece. All are made of metal or made of metal alloys and have a very powerful sound. The most important representatives of this group are the horn, the trumpet, the trombone and the tuba. They are all part of the orchestra and also of military bands.
The old instruments of this group had a smooth tube. Over time additional holes, wrenches and tubes called threads and pistons were added.
