The right option is; B. a physical boundary between France and Spain
Pyrenees are various mountains situated in southwest Europe. Pyrenees forms a physical boundary between Spain and France while Andorra (a small country) is located between them. Pyrenees covers about 267 miles from the Bay of Biscay to the Mediterranean Sea. The eastern area of the Pyrenees are mostly made up of rocks (granite and gneissose), while in the western area, the top of the granite contains layers of limestone.
