Final answer:
Polly's action in PowerPoint could range from adding or editing action buttons to creating or using equations from the equation gallery; the exact action is unclear without further details.
Step-by-step explanation:
If Polly has a screen open in PowerPoint, she is most likely performing one of several possible actions related to creating or editing a presentation. However, without more specific information, it's not possible to determine exactly which action she is undertaking. Actions include adding action buttons, which can be used to navigate between slides or to hyperlink to external resources. She could also be editing action buttons previously added to a slide to change their function or appearance. If she's working with mathematical content, she might be making an equation by inputting formulas or symbols. Lastly, she could be using the equation gallery, a feature in PowerPoint that provides a variety of common mathematical equations and structures to insert into slides. Nonetheless, due to the lack of context, we cannot definitively conclude which action she is performing.