The Secretary of Defense that is the answer.
The Attorney General.
The attorney general is the head of the DOJ and chief law enforcement officer of the federal government. The Attorney General represents the United States in legal matters, advises the President and the heads of the executive departments of the government, and occasionally appears in person before the Supreme Court.
The correct answer is: Presidential cabinet
It is the name given to the group of executive department head who advises the President of the United States on any issue he finds important or needs to address in regards to the duties of each member's respective office.
Its functions were established in Article II, Section 2 of the Constitution, and as noticed, many relevant presidential decisions rely on this group.
The department of Justice is headed by the United States Attorney General, who is nominated by the President and confirmed by the Senate and is a member of the Cabinet.
Attorney General is the answer.