Which part of the government interprets laws and can declare them unconstitutional?

The Judicial Branch is the correct answer because it is the component of government specifically tasked with interpreting laws and determining their constitutionality. This function is primarily carried out by the court system, particularly the Supreme Court, which has the authority to review laws and executive actions to ensure they align with the Constitution. Through the process of judicial review, the courts can declare laws or executive actions unconstitutional if they violate the Constitutional framework.

The role of interpreting laws is crucial in protecting individual rights and maintaining checks and balances among the branches of government. By holding that certain laws may not conform to the Constitution, the Judicial Branch acts as a guardian of constitutional principles, ensuring that legislative and executive actions do not infringe upon the rights of citizens or exceed their constitutional authority.

In contrast, the Legislative Branch focuses on creating laws, while the Executive Branch enforces them. The Civil Service, although an important part of government operations, is not a branch and does not possess the powers to interpret laws or exercise judicial review.