How are federal governments different from unitary governments?

So in unitary government, the central government has all the power.

In a federal system, some of the powers in a federal system are given to the central government and other powers are given to the lower levels of government.

Explanation:

herodotus taught this. herodotus was an ancient greek historian who was born in halicarnassus in the persian empire. he is known for having written the book the histories, a detailed record of his "inquiry" on the origins of the greco-persian wars.

first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.