Question

is the group of words in bold a phrase or a clause?
the u.s. marshals service is a federal law enforcement agency that handles numerous responsibilities, including the apprehension and transportation of federal fugitives.
phrase
clause

Explanation:

A phrase is a group of words without a subject - verb relationship, while a clause has a subject and a verb. The bolded group “a federal law enforcement agency” has no subject - verb combination (it's a noun phrase describing the U.S. Marshals Service), so it's a phrase.

Answer:

phrase