What purpose do transition words serve in a sentence?

Transition words play a crucial role in writing by connecting ideas and indicating the relationships between them. They guide the reader through the text, helping to clarify how different parts of a sentence or paragraph relate to each other. For instance, words like "however," "therefore," and "moreover" provide context and coherence, making the argument or narrative easier to follow. This understanding enhances the flow of the writing, allowing for clearer communication of concepts and ideas.

The other options do not accurately represent the function of transition words. They do not create confusion or introduce unrelated concepts; rather, their purpose is to clarify relationships. Additionally, while transition words may sometimes serve to replace simple punctuation marks in informal contexts, they do not fundamentally replace punctuation, as punctuation serves a broader purpose in sentence structure.