Final answer:
Article I of the US Constitution establishes Congress, which comprises the Legislative branch of government responsible for making laws. It requires Congress to be bicameral, including the Senate and the House of Representatives.
Step-by-step explanation:
Article I of the US Constitution deals with the Legislative branch of government, which is the branch responsible for making laws. Specifically, Article I, Section 1, establishes Congress as the legislative body and requires it to be bicameral, consisting of the Senate and the House of Representatives. The creation of a two-house legislature was a compromise to balance the powers between the states and the people. Additionally, Congress holds other key powers such as overseeing the budget, introducing legislation, and declaring war.
The answer to the student's question is that Article I deals with the Congress, which is the Legislative branch of government (Option 4).