Although folk country and bluegrass music share several musical instruments in common there's one instrument that is widely used in country music and almost never used in folk or bluegrass which one is it

Although folk country and bluegrass music share several musical instruments in common there's one instrument that is widely used in country music and almost never used in folk or bluegrass. This instrument is the pedal steel guitar.
Both folk country and bluegrass are traditional country music.The difference is that bluegrass relies mostly on acoustic stringed instruments.

Very true. in today’s age anything is possible.

Perspective is important because it enabled the 3 dimensional world to be translated into the 2d world of the picture plane. this had an immediate impact on the representation of reality in art and design.