Answer:
Dual federalism is the theory that the federal government and the state governments operate in separate realms in which each is respectively sovereign. Support for this in practice is made with appeals to the 10th amendment and the states' insistence that the enumerated powers are the sole powers of the national(federal) government. Cooperative federalism, however, emphasizes the overlapping spheres of power and operation across the levels of government. This cooperative principle is seen in the implementation of federal policy with federal funds, by the states who have sanctioned such policies.