According to the Constitution, the president has the power to grant pardons for federal crimes
This power is outlined in Article II, Section 2, Clause 1, when it states that the President "shall have Power to grant Reprieves and Pardons for Offences against the United States, except in Cases of Impeachment."
The other options, on the other hand, are incorrect because Article II grants the President the power to appoint Supreme Court judges but it is the Senate that can approve those nominations; likewise, according to Article I, Section 8, Congress is the one with the responsibility to raise taxes. And lastly, it is the Judicial branch, and not the President, the one that can declare a law unconstitutional.
An example of a cabinet department is the Office of Health and Human Services
Cabinets departments refer to the head of the 15 executive departments that, along with the Vice President, advise the President on subjects regarding their departments. One of those 15 departments is "the Office of Health and Human Services", whose general aim is to protect and improve the health of Americans and to provide essential human services.
The main function of the executive branch is to carry out and enforce laws and policies
The main function of the Executive Branch, whose power is vested in the President, is to enforce laws and policies passed by Congress. He accomplishes such task by relying on the 15 executive branch agencies.
