The sentence that has an adjective clause: C. Liz, who could always make people laugh, was loved by the whole block.
In that sentence, the clause "who could always make people laugh" functions like an adjective, modifying a noun. Liz (proper noun, a person), is described or modified by the clause.
The other types of subordinate clauses in a sentence are:
- noun clauses, which function the way nouns do in a sentence, as subject or object. (None of the examples shown fit this category.)
- adverb clauses, which function like adverbs, modifying a verb or adverb within a sentence. The other three examples shown all have adverb clauses, where the clause modifies the verb (action of the sentence) in some way.