Which would be considered a physical change of matter?

Physical changes involve states of matter and energy. The size, shapem and color of matter may change. Physical changes occur when substances are mixed but don't chemically react.

Explanation:

depends on what they need

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.