Article I of the U.S. Constitution embody the principle of republicanism. option (b) It describes the legislative branch, made up of representatives elected by the people of each state.

What does Article 1 of the constitution explain ?

The legislative branch of the federal government, the United States Congress, is established under Article One of the United States Constitution.
According to Article One, the House of Representatives and the Senate make up the bicameral Congress. 73 Article One gives Congress the authority to enact laws that are "necessary and proper" to carry out the different defined duties.
Additionally, Article One lays out the steps for adopting legislation, sets restrictions on Congress's authority, and prohibits the states from misusing their authority.
The Article One Vesting Clause stipulates that the House of Representatives and the Senate make up Congress and that it has full legislative authority over the federal government.
Together with the vesting provisions of Articles Two and Three, the vesting provision of Article Four The first one outlines the division of authority between the three branches of the federal government.