What is an example of federalism?

An example of federalism is the principle that the national and state governments share power. Federalism is a system of governance where power is divided between a central authority and various constituent units—in this case, the national government and state governments. This division of power allows both levels of government to operate independently within their own spheres of influence while also collaborating on shared responsibilities, such as taxation, infrastructure, and public safety. This structure is foundational to the U.S. political system, as it enables states to maintain a degree of sovereignty and tailor policies to their local needs, while the national government addresses issues that affect the country as a whole.

Other choices refer to powers specific to either the national government or actions taken within a specific branch of government, rather than illustrating the broader principle of shared authority that characterizes federalism.