Which of the following is not an example of a historically ethnically diverse country in europe?
a. macedonia
b. switzerland
c. bosnia and herzegovina
d. ireland

The answer is c. Bosnia and Herzegovinia.  It is composed of several ethnic groups like the Croats, Muslims and Serbs.  When Communism collapse, an ethnic conflict erupted due to the Serbs’s desire to take over the whole country. Many people died during period and the conflict was stopped due to intervention by international forces and the U.N.

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.