a string instrument
Woodwind.
Generally they are percussion instruments. Assuming you mean like a snare, bass, etc.
Stringed instruments such as cellos, violins, and violas.
the cello
largest
Compass
vadyopakaranam
The clarinet
No, the frost will not harm violas. They will not bloom in the winter but they will survive the frost.
There can be any number of violas in an orchestra. It most commonly depends on the conductor.
The plural form of viola is violas.
A full orchestra generally uses 12 violas.