An adjective clause is a dependent clause that modifies a noun or pronoun, providing more information about it. It typically begins with words like where, who, which, or that.

In this sentence:

• The clause "where they sell good food" describes the noun "place", making it an adjective clause.

The other options contain adverbial clauses (e.g., "when he was hungry") or noun clauses (e.g., "that you had a good time").