What is the function of conjunctions in a sentence?

Conjunctions serve the essential function of connecting words, phrases, or clauses within a sentence. This function is crucial for creating complex sentences and conveying relationships between different parts of a sentence. For instance, conjunctions like "and," "but," and "or" help to link ideas together, allowing for more fluid and expressive communication. They enable writers and speakers to combine thoughts and create more nuanced meanings without losing clarity in their sentences. This connection can enhance the overall coherence of a text or speech.

The other options refer to different grammatical functions that fall outside the role of conjunctions. Replacing nouns pertains to pronouns, describing adjectives involves adverbs, and indicating a change of subject does not align with the primary purpose of conjunctions. Therefore, understanding the role of conjunctions as connectors is fundamental to grasping sentence structure and improving language skills.