In writing, what function do transition words serve?

• A. They change the tense of verbs.
• B. They provide background information.
• C. They present the main idea.
• D. They connect ideas and guide the reader from one idea to the next.

Answer: (D)

Transition words create coherence by linking sentences and ideas and guiding the reader from one idea to the next. They signal relationships like addition, contrast, cause and effect, sequence, and emphasis, helping the flow of thought feel connected rather than choppy. For example, words like and or also add information, but signals a shift in thinking or a contrast, therefore shows consequence, and first or next lays out order. They don’t change verb tense, provide background information on their own, or by themselves present the main idea; those functions come from verb forms, surrounding context, and topic sentences. So the reason this option is best is that it precisely describes how transitions work to knit ideas together and steer the reader through the writer’s train of thought.