What button must you click to add a new report to the toolbar?

To add a new report to the toolbar, the correct choice is the wrench button. This button typically serves as a symbol for settings or tools, which are often associated with customization options in software interfaces. When you click the wrench button, it is likely to lead you to functionality that allows you to modify or add elements, such as reports, to your toolbar.

The other options do not fulfill the required action of adding a report. The save button is primarily used for saving changes rather than adding new elements, while the add button, although it might initially seem plausible, does not specifically imply access to toolbar management in some UI contexts. The options menu often provides a broader set of choices for configuration but is not directly associated with adding content to the toolbar in a straightforward manner. Thus, the wrench button is the most appropriate tool for the task at hand.