Arizona Civics Practice Test: Prep, Practice Exam & Study Guide

The Constitution is the foundational document that outlines the framework of the U.S. government. Ratified in 1788, it establishes the structure of government, delineates the powers of the federal government, and sets forth the principles of federalism, separation of powers, and checks and balances among the three branches of government: the legislative, executive, and judicial branches. The Constitution also includes provisions for its own amendment, ensuring that it can adapt to changing societal needs.

In contrast, the Bill of Rights, which comprises the first ten amendments to the Constitution, focuses specifically on individual rights and limitations on government power, rather than outlining the government's structure. The Declaration of Independence, while a crucial historical document that declares the colonies' separation from British rule, does not provide a government framework. The Federalist Papers are a collection of writings that support the ratification of the Constitution and explain its principles, but they do not establish the government's framework themselves. Thus, the Constitution is the document that serves as the foundation for the governance of the United States.