Final answer:
The table of contents is a text aid that provides a detailed list of a book's chapters and sections, allowing readers to easily navigate the text.
Step-by-step explanation:
The text aid that helps us to understand how a text is organized is the table of contents. This helpful tool can be found at the beginning of a book or document, and it provides a list of the chapters, sections, and sometimes subsections within the text, along with their corresponding page numbers. The table of contents allows readers to quickly click through the text to different sections, ensuring that students and professors can easily be on the same page. In electronic formats such as on computers and cell phones, the table of contents is conveniently located and can be navigated with simple clicks.