Which of the following performs oversight functions?

The judiciary performs oversight functions. Oversight refers to the responsibility of ensuring that government actions are in accordance with the law and that government officials are held accountable for their actions. The judiciary is responsible for interpreting the law and adjudicating disputes, which involves reviewing the actions of the other branches of government to ensure that they comply with the law and the Constitution. For example, if the executive branch takes an action that is deemed unconstitutional or violates the law, individuals or organizations can challenge that action in court. The judiciary then reviews the action and determines whether it is lawful or not. In this way, the judiciary serves as a check on the power of the executive and legislative branches and ensures that they do not exceed their authority. In contrast, civil service, executive, and bureaucracy are all part of the executive branch of government, which is responsible for implementing laws and policies. While these branches may have internal oversight mechanisms, they do not perform the same kind of external oversight functions as the judiciary.