What is one of the main advantages of using shading in a document background?

Using shading in a document background serves to emphasize specific content, making it stand out visually from the rest of the text. This approach effectively draws the reader's attention to important information, such as key points, headings, or highlights, which can enhance comprehension and retention. By creating a contrast between the shaded areas and the text, the overall layout becomes more engaging and organized.

The other options do not relate to the primary benefits of shading. For example, increasing font size relates to text size rather than visual background elements; improving grammar pertains to language accuracy rather than formatting; and providing hyperlinks is associated with interactive elements in digital documents, not solely with document aesthetics like shading. Thus, the focus of shading ensuring specific content is highlighted is its most distinctive advantage.