Final answer:
Henry's role is that of a U.S. Ambassador, representing the United States abroad and managing diplomatic relations as part of the execution of U.S. foreign policy.
Step-by-step explanation:
Henry performs the role of a U.S. Ambassador. As an appointed official who has been confirmed by the U.S. Senate, his responsibilities include representing the United States in a foreign country, conveying the U.S. government's ideas to that country's government, and managing official diplomatic relations.
The Ambassador is a crucial figure in the execution of U.S. foreign policy, working closely with the Secretary of State and under the ultimate authority of the President.