What is the secretary of the state? for the United States

Explanation:

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.

answer; (d) none of the above;

i believe

clean air is essential for health and survival

clean air provides nitrogen gas for plant respiration

clean air supplies oxygen that enables living organisms to breathe

hope this

i am brianly

sorry if this doesn't