What is a synonym for the term perceptual region?

What term is given to the border between the central alps and the southern limestone alps?

Lines of longitude are like stripes from the top of the globe down to the bottom virtually slicing the earth like an orange

This map shows the member states of the european union (eu). based on this map, what is the most likely reason the eu was formed? a) to increase trade between european nations b) to protect themselves from foreign enemies c) to begin the process of forming one large nation d) to isolate europe from the rest of the international community j