The main duties of the include providing security at federal courts, controlling property seized by federal courts, protecting government witnesses, transporting federal prisoners, and investigating violations of federal fugitive laws.

U.S. Marshals, is the right answer.

Explanation:

A federal law enforcement bureau of the United States which works under the Department of Justice is known as the United States Marshals Service. Formed by the Judiciary Act of 1789, it is the oldest federal law enforcement agency in the U.S and the United States Marshals Service was formed in the year 1969 for guiding and assist to the marshals everywhere the federal judicial districts.

Accordingly, the given are the duties associated with the U.S. Marshals.

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