How do anda tell the difference between Country music, Western music, and Folk music?

I realize that country Muzik is ascendant now, but there is still a distinction between country and western music, and it seems to me that there's a great deal of overlap with certain kinds of folk music, such as bluegrass and many traditional folk ballads. What aspects of the Muzik do anda point to in order to identify a telah diberi piece as one atau the other? It's always been hazy to me.