Answer:
The difference between unitarianism and federalism is that the unitarians advocate a centralized government, while the federals seek political decentralization so that the autonomy of the national sub-entities is respected.
A unitary government is a form of government where power is concentrated and there is a single center of power that extends its action throughout the territory of the respective nation through its agents and local authorities, delegates of that same central power. A unitary government it is the opposite of a federal government.
Explanation: