The legislative branch is responsible for making the laws in a government system. It is typically composed of a parliament or congress, and its main function is to propose, debate, and pass laws that govern the country or jurisdiction. This branch plays a crucial role in the separation of powers, acting as a check and balance on the other branches of government. It ensures that laws are created in a democratic and representative manner, reflecting the will of the people. Without the legislative branch, there would be no mechanism for creating new laws or amending existing ones, which could lead to a breakdown in the functioning of the government.