Which of the following is an example of an executive order?

The correct answer is the directive issued by the President to manage operations of the federal government. An executive order is a tool that allows the President to direct government operations without needing congressional approval. It serves various functions, such as implementing legislation, managing federal agencies, and outlining procedures for government operations, thereby directly influencing how laws and policies are executed within the executive branch. This authority is grounded in the President's role as the head of the executive branch, allowing for swift action, particularly in areas related to national security or administrative efficiency.

The other options do not fit the definition of an executive order. A bill passed by Congress requires legislative approval and is a law, while a resolution adopted by the Senate is a formal expression of opinion or intent but does not possess the force of law. A treaty, though impactful and involving executive authority, must be negotiated and ratified with the advice and consent of the Senate, which distinguishes it from the unilateral nature of executive orders.