What feature of e-books makes them particularly effective as reference materials?

E-books are particularly effective as reference materials due to their ability to contain internal hyperlinks, which greatly enhance navigation and usability. These hyperlinks allow users to easily jump between related topics, references, or sections within the text without having to manually search through the entire document. This feature simplifies the process of finding specific information quickly, making e-books more interactive and user-friendly compared to traditional print reference materials.

Moreover, the search functionality often embedded in e-books complements the hyperlink capability, enabling users to conduct keyword searches to locate information rapidly. Together, these features transform the way users interact with reference material, facilitating more efficient research and study processes.