Which of the following is a constitutional responsibility of the legislative branch of the US?

The responsibility of the legislative branch of the U.S. government, as defined by the Constitution, is specifically to create and enact laws. This involves drafting, debating, and voting on legislation that sets the legal framework for how the country operates. The correct answer highlights the legislative branch's role in the administration of laws, which includes overseeing their implementation and establishing guidelines for how these laws are to be applied.

While the enforcement, interpretation, and execution of laws are essential functions in governance, these roles fall under the responsibilities of other branches. The executive branch is primarily tasked with enforcing laws, ensuring that they are carried out effectively. The judicial branch interprets laws and determines their constitutionality, resolving disputes that arise under these laws. Therefore, understanding the distinct functions of each branch clarifies why the administration of laws is indeed a responsibility linked to the legislative branch, as it involves the foundational process of law-making.