Which statement describes a major advantage of a federal system of government over a unitary system?

The main advantage of a federal system of goverment over a unitary system is the prevention of a single government  from possession of all the powers and authority in the country.In the federal government,power is divided between national government and state goverment with a balance between them.For example the United States of America government system.

mesopotamian code of hammurabi

and i think its 1860 b.c. you mean lol

im not sure its either a leader of a group of congresspeople or a person from a congressmans district

sorry im not sure