Final answer:
The reasoning behind the difference in membership between the branches of government lies in constitutional requirements and the historical quest for a balanced power structure. This ensures a system of checks and balances, preventing any single branch from overpowering the others.
Step-by-step explanation:
The difference in membership between the branches of government is due to a combination of constitutional requirements and the need for a balance of power. These constitutional arrangements were instituted to prevent any one branch from becoming too powerful and ensure a system of checks and balances. Historical traditions also play a role, reflecting the framers' intention for a government that could regulate itself and protect the rights of its citizens through separate but interdependent branches.
According to the U.S. Constitution, the legislative branch, composed of Congress, is tasked with creating laws. Conversely, the executive, led by the President, is responsible for enforcing them. The judiciary interprets laws and their alignment with the Constitution. The assignment of these responsibilities and the operation of checks and balances are crucial to maintaining government autonomy and preventing the overconcentration of power within any single branch.