Question

is the group of words in bold a phrase or a clause? humans have unique fingerprints, and this holds true even for identical twins. phrase clause

Explanation:

A clause contains a subject and a predicate (a verb and what it acts on). The bolded group "Humans have unique fingerprints" has the subject "Humans" and the predicate "have unique fingerprints" (verb "have" with its object). A phrase lacks a subject - predicate structure. So it's a clause.

Answer:

clause