Federalism contributes to economic and political differences among the states because it

it permits each state freedom.

Explanation:

The term federalism itself defines a type of government in which there is sharing of power at two levels of government each enjoying equal status. Each state enjoys sovereignty at the local level and it sometimes leads to political and economic differences because it permits each state freedom. each state develops a unique identity and holds itself above others.

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.