Answer:
Articles I, II and III of the Constitution establish the legislative, executive, and judicial branches of the federal government .
Step-by-step explanation:
The Constitution of the United States of America is the basis and starting point for all US federal law and authority. The Constitution also regulates the relationship between the federal government with the states and citizens of the United States.
The Constitution defines three branches of the power apparatus: a legislative assembly with two chambers, the House of Representatives and the Senate, which together form the Congress, which is regulated by Article I; an executive branch headed by the President, regulated by Article II; and a judicial power led by the Supreme Court, regulated by Article III.
The Constitution outlines the powers and duties of each of the three branches, and assigns a number of tasks to the states, thereby creating a federal system of government.