Cello is a bass instrument, and therefore has the bass clef. And, if you wanted to play in treble clef, you would have to go a lot higher, whereas bass clef is a lot easier because it allows you to...
Most brass instruments either use bass clef or treble clef. Most of the low brass, like trombones and tuba, play bass clef, and most of the high and middle brass, like trumpets and french horns, play...
The use of three different clefs makes it possible to write music for all instruments and voices. This would be difficult to do with only one clef, since the modern staff has only five lines, and the...