Which of the following is a power granted to Congress?

The power granted to Congress that stands out is the ability to declare war. This authority is explicitly outlined in Article I, Section 8 of the U.S. Constitution. The Framers of the Constitution intended for Congress to have this power as a way to ensure that such a significant decision would involve the representation of the people through their elected officials. By requiring congressional approval, the Constitution establishes a system of checks and balances, preventing any single branch of government, particularly the executive, from unilaterally engaging the nation in conflict.

When exploring the other options, it is evident that they do not fall under Congress's specific powers as outlined in the Constitution. Interpreting laws is a function reserved for the judiciary, which ensures that laws are applied and understood consistently. Making treaties is primarily a power granted to the President, although the Senate must ratify such treaties. Lastly, enforcing laws is typically the responsibility of the executive branch, specifically the President and various federal agencies, which carry out and administer legislation passed by Congress. This delineation of powers is fundamental to the structure of the U.S. government, emphasizing the distinct roles of each branch.