Final answer:
The Constitution improved on the Articles of Confederation by establishing a bicameral legislature, with the Senate and the House of Representatives.
Step-by-step explanation:
The Constitution improved on the Articles of Confederation regarding the legislative branch by establishing a bicameral legislature.
Under the Articles of Confederation, the national legislature was composed of a single chamber with an equal number of delegates from each state. However, with the Constitution, the legislative branch was divided into two separate houses: the Senate and the House of Representatives. The Senate consisted of two members from each state, providing equal representation for each state. On the other hand, the House of Representatives was based on the population of each state, ensuring proportional representation.
As a result, the Constitution's bicameral legislature addressed the weaknesses of the Articles of Confederation by balancing the power between large and small states and promoting fair representation.