Which of the following best defines the Constitution of the United States?

The Constitution of the United States serves as the fundamental legal framework that establishes the structure, functions, and limitations of government authority, alongside the rights of citizens. It is a comprehensive document that outlines how governmental powers are distributed among different branches, ensures checks and balances, and guarantees individual rights through its amendments.

This definition encapsulates the primary purpose of the Constitution, which is to create a system of governance that operates under the rule of law, rather than under the whims of individual leaders. By setting forth the principles and guidelines for legislative, executive, and judicial powers, it ensures that no single entity has absolute control, thereby promoting democracy and protecting liberties.

The other options do not reflect the essence of the Constitution. A declaration of war is a specific governmental action, not a broad legal framework. An outline for a monarchy contradicts the Constitution's intention as it establishes a republic with elected officials rather than a hereditary system. Lastly, while the Constitution includes amendments, it is more than just a collection of amendments; it is the foundational document that includes principles that govern the United States.