What is one power that belongs only to the federal government?

The ability to declare war is a power that is specifically reserved for the federal government. This authority is outlined in the U.S. Constitution, which grants Congress the exclusive power to declare war. This ensures that decisions regarding military engagement and national defense are centralized and made at the federal level, reflecting the need for a united front in matters of significant national importance.

In contrast, establishing schools is primarily a power held by state governments, as education policies and systems are determined locally. Providing driver's licenses is also managed at the state level, where each state sets its own requirements and regulations for licensing. Similarly, regulating marriage falls under state jurisdiction, with each state establishing its own laws governing marriage licenses and related matters. These distinctions highlight the division of powers between federal and state governments, emphasizing the unique role of the federal government in declaring war.