Why is underlining rules, formulas, and important statements in textbooks considered a good practice?

Underlining rules, formulas, and important statements in textbooks indeed creates a stronger impression, as it visually emphasizes critical information. This practice can enhance focus and retention, allowing key concepts to stand out as the reader navigates through the material. By drawing attention to important elements, it fosters a deeper engagement with the content.

While other choices suggest valuable benefits, the act of underlining primarily serves to highlight essential points, reinforcing their significance in the reader's mind. This makes it easier to recall the core ideas during later reviews or discussions, ultimately enhancing the overall learning experience.