What do hierarchies allow you to do within a workbook?

Hierarchies play a critical role in data organization and presentation within a workbook, as they allow you to display data at different levels of detail. By leveraging hierarchies, users can drill down into or roll up data, enabling them to view aggregates or specific data points as needed. For instance, in a sales analysis workbook, a hierarchy might allow a user to view total sales by region, then drill down to see sales by state or even by individual stores within that state. This capability aids in providing a clearer, more structured analysis of complex datasets.

While limiting access to data, creating dynamic dashboards, and exporting data to external files are important functionalities in data management and presentation, they do not specifically pertain to the primary function of hierarchies within a workbook. Instead, hierarchies focus on the organization and visualization of data's levels of detail.