Question

is the group of words in bold a phrase or a clause? adult male gorillas, which are dominant and sometimes aggressive, lead family groups of females and young males. phrase clause submit

Explanation:

A clause has a subject and a predicate (a verb or verb phrase), while a phrase does not. The bolded group "which are dominant and sometimes aggressive" has a subject ("which") and a predicate ("are dominant and sometimes aggressive"), so it is a clause.

Answer:

clause