What does the Constitution do?

The Constitution serves as the foundational legal document of the United States, establishing the framework for the federal government. It outlines the structure, powers, and responsibilities of the three branches of government: executive, legislative, and judicial. By doing so, it sets up how the government operates, how laws are made, and the relationship between the federal and state governments. This establishment of government is essential for ensuring a system of checks and balances that is vital to functioning democracy.

While other options address important aspects related to governance and society, such as citizenship and law, they do not encapsulate the primary role of the Constitution itself. Grants of citizenship, definitions of laws, and budget creation are processes and activities that occur under the overarching framework that the Constitution provides. Therefore, the correct answer highlights the Constitution's main purpose of establishing the government and its functioning.