What's the difference between a unitary system and a federal system?

In a unitary system, the central government has all the power. In a federal system, some powers are given to the central government and other powers are given to the lower levels of government (provinces or states). ... In a federal system, they have a right to their powers

it makes companies more competitive it mainly alot

giving the us more money to give to the states it allows them to sell oversee and to other countries and more

this isn't a question and if you're going to list things be kind and use commas.