Answer:
executive branch of the federal government
Explanation:
According to my research on the government chain of command, I can say that based on the information provided within the question this department is under the responsibility of the executive branch of the federal government. Every position within the government has a higher level in which they answer to, all leading up to the highest power which is the President of the United States of America.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.