Exclusive powers are those authorities that are reserved solely for the federal government and cannot be exercised by the states. These powers, outlined in the U.S. Constitution, ensure a clear delineation of responsibilities and functions between the national and state governments, promoting a system of federalism that balances power and authority. By granting specific powers to the federal government, such as regulating interstate commerce and conducting foreign affairs, exclusive powers help maintain a unified national policy while allowing states to govern local matters.