what advantage does Federal system of government have over Confederal and Unitary?

Example sentence frames:

One advantage the federal system of government has over confederal is ______.

One advantage the federal system of government has over unitary is_____.

One advantage the federal system of government has over confederal is that it allows for greater coordination and cooperation among different regions or states within the country.

One advantage the federal system of government has over unitary is that it provides more opportunities for localized decision-making and representation, allowing for a greater sense of regional identity and autonomy.