The executive branch has many parts. Name one.

Why this is the answer

The executive branch is far bigger than a single office. The official list accepts three answers: the President, the Cabinet, and the federal departments and agencies. Any one of them is enough. The President is at the top. Article II opens by placing "the executive Power" in a President of the United States, which makes the President responsible for enforcing federal law. No one person can do that alone, so the branch also includes the executive departments, each led by an official who in most cases carries the title Secretary; the Secretary of Homeland Security, for example, runs the Department of Homeland Security. The heads of these departments belong to the Cabinet, the group that advises the President. Each department in turn has many smaller agencies. The study guide offers two examples worth remembering: the FBI is part of the Department of Justice, and USCIS, U.S. Citizenship and Immigration Services, is part of the Department of Homeland Security. Together, the departments and agencies help the President enforce laws, protect the country, work with other countries and provide services to the public. The Constitution assumes this structure from the start. Article II, Section 2 lets the President require a written opinion from the principal officer of each executive department, which only makes sense if there are departments with officers in charge of them. Answers from another branch do not fit. Congress, made up of the Senate and the House of Representatives, is the legislative branch, and the Supreme Court leads the judicial branch, so none of those works. The Vice President is a harder case. The study guide does treat the Vice President as part of the executive branch, but the official list for this question does not name the office as an answer, so one of the three listed parts is the safer choice. Picture a pyramid: the President at the peak, the Cabinet just below, and the departments and agencies forming the wide base.