Apolitical unit or body of people living within a specific territory under one federal government is defined as a

a. province
b. country
c. constitution
d. state

need its for history

A country is defined as a political unit or body of people living within a specific territory under one federal government. It can also be a territory that is inhabited by people of one or several nations. Example is America, where its population is composed of Americans and other races like Latins, Filipinos, Mexicans, etc. 

A country shares certain communities, history, and culture amongst its people. It limits or emphasizes the size and exact boundaries of a territory in a geographical sense.