Final answer:
The National Security Council (NSC) is the group used solely to advise the President on matters of national security and foreign policy, and does not require Senate approval.
Step-by-step explanation:
The group that is solely used to advise the President of the United States is the National Security Council (NSC). The NSC includes senior-level staff from multiple foreign policy agencies and is led by the national security advisor, who is typically the president's top foreign policy advisor.
The NSC is part of the Executive Office of the President, created by Franklin D. Roosevelt, which also contains other advisory bodies such as the Council of Economic Advisers, the Office of Management and Budget (OMB), and the Office of the Vice President. Unlike the Cabinet, whose secretaries must be confirmed by the Senate and which includes the heads of major departments like State, Treasury, and Defense, the NSC staff serve solely at the pleasure of the president and are not subject to Senate approval.
The group that is solely used to advise the President is the National Security Council. It is a group of senior-level staff from multiple foreign policy agencies and is headed by the national security advisor. The National Security Council is responsible for providing advice on national security and foreign policy matters to the President.