The darker, center part of a shadow is called an ?

The red square is a famous historical site that is located in

How would i answer this for an exam?

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