The core concept tested here is the function of an adjective. An adjective's primary role is to modify or describe nouns or pronouns, providing more details about them. Option B directly states this role. Option A describes a conjunction, Option C describes a verb, and Option D describes an adverb. Therefore, Option B is the only correct answer. * **Core Concept:** Function of an adjective * **Solving Strategy:** Identify the primary role of an adjective in a sentence. * **Option Analysis:** * **A:** Incorrect. Conjunctions connect words, phrases, or clauses. * **B:** Correct. Adjectives modify or describe nouns or pronouns. * **C:** Incorrect. Verbs express actions or states of being. * **D:** Incorrect. Adverbs indicate time, place, or manner. * **Easy Mistakes:** Confusing adjectives with adverbs or conjunctions.