What action do you need to take to ungroup selected images in PowerPoint?

To ungroup selected images in PowerPoint, the correct action involves using the Group button found in the Format Ribbon Tab and selecting the Ungroup option. This method allows users to easily manage grouped objects efficiently. When multiple images are grouped, they are treated as a single entity, and to manipulate them individually again, ungrouping is necessary.

By utilizing the Group button, users can access a variety of options that pertain directly to grouping actions, including the ability to regroup or ungroup objects seamlessly. This functionality is particularly useful when working on complex presentations where multiple visuals need to be managed simultaneously.

Using the right-click context menu is also a valid option for ungrouping objects, but it is not the primary method emphasized in many user guides and resources, hence why it might not be the best answer in this context. The other options do not represent valid ways to achieve ungrouping; accessing the Format menu in the Design Tab typically deals with the overall design aspects of the slide rather than specific object manipulation, and pressing the Delete key would simply remove the selected images rather than ungroup them.