What is the name of the tab located at the bottom of a worksheet that indicates which worksheet is currently active?

The tab located at the bottom of a worksheet that indicates which worksheet is currently active is called the "Sheet tab." Each worksheet in a workbook has its own tab, and these tabs allow users to navigate between different worksheets easily. When you click on a specific sheet tab, it becomes the active worksheet, and its contents are displayed in the main part of the Excel window. This functionality is crucial for organizing data within a workbook, as it enables users to manage multiple sheets effectively.

The other options do not refer to the correct type of tabs in this context. "Chart tab" is not a feature that indicates an active worksheet, but rather pertains to charts and graphical representations of data. "Cell tab" does not exist as a concept in spreadsheet applications—cells are individual data points within a worksheet. Similarly, "Formula tab" refers to a ribbon in Excel that provides access to functions and tools related to formulas, rather than designating the current worksheet active status. Therefore, the correct answer is the "Sheet tab," as it precisely fulfills the purpose of identifying the active worksheet.