To determine which sentence supports the main idea of a paragraph, first, identify the main idea—usually stated in the topic sentence, often found at the beginning or end. Supporting sentences provide details, examples, or explanations that reinforce this idea.
For example, if the main idea is, “Exercise improves mental health,” supporting sentences might include, “Regular physical activity reduces stress and anxiety levels,” or “Exercise stimulates the release of endorphins, enhancing mood.” These details align with and strengthen the main idea.
Look for sentences that directly connect to the topic without introducing unrelated information. Paying attention to transitions like “for example” or “this shows” can also help identify key supporting details effectively.