Answer:
Electoral College
Department of Defense
The Food & Drug Administration
Step-by-step explanation:
We can eliminate the Speaker of the House right off the bat, as the speaker of the house is part of the House of Representatives which is part of the Legislative Branch!
The Electoral College is neither an agency or a department, it is a method how the president is chosen.
These leaves The US Air Force, The Department of Defense, and the Food and Drug Administration.
We can reassure this by knowing that the Department of Defense is a part of the Executive Branch, and as the Air Force is a department under the Department of Defense this makes the Air Force part of the executive branch.
Hope it helps!