The core concept here is the function of a conjunction in grammar. Conjunctions are used to join different elements within a sentence. * **A is incorrect:** Adjectives describe nouns, not conjunctions. * **B is correct:** Conjunctions like 'and', 'but', 'or' directly connect sentence elements. * **C is incorrect:** Interjections express emotions, not conjunctions. * **D is incorrect:** Adverbs of time or place indicate time or place, not conjunctions. The key point is understanding that conjunctions connect different parts of the sentence, while the other options represent different grammatical elements. **Core Concept:** Function of Conjunctions **Solution Strategy:** Identify the grammatical role of a conjunction. **Option A Analysis:** Adjectives, not conjunctions, are used to describe nouns. **Option B Analysis:** Conjunctions serve the purpose of connecting words, phrases, and clauses. **Option C Analysis:** Interjections, not conjunctions, express strong emotions. **Option D Analysis:** Adverbs, not conjunctions, indicate time or place. **Common Mistake:** Confusing conjunctions with other grammatical elements like adjectives, interjections or adverbs.