In reading comprehension, what is the main idea?

• A. The sequence of events.
• B. The author's tone and style.
• C. The supporting details and examples.
• D. The central point a passage is communicating.

Answer: (D)

The main idea is the central point the author is communicating in a passage. In reading comprehension, identifying it means grasping the overall message or claim the text is making—the takeaway that ties all the details together. This matters because the main idea explains why the author included each detail and what the passage as a whole is trying to say.

Think of it as the overarching claim, not just the topic or a single event. The sequence of events describes what happens and in what order, which is about structure rather than the message. The author's tone and style describe how the writer expresses ideas, which is about voice rather than the content itself. The supporting details and examples are evidence used to illustrate the main idea, not the central point on their own.

If you can sum the passage up in one sentence that states its overall message, you’ve identified the main idea. For example, if the passage argues that transitioning to renewable energy is essential to reduce pollution, the main idea is that moving toward clean energy is necessary for a healthier environment, with details showing pollutants reduced, costs, and policy examples as support.