Which activity status change is indicated by the disappearance of the star icon?

The disappearance of the star icon indicates that the activity status has changed to "In Progress (viewed)." The star icon typically signifies that an activity has been newly created or that it has been updated, prompting the user to pay attention to it. Once the user views or engages with the activity, the star icon is removed, reflecting that it is no longer new or requiring immediate attention.

This change helps users quickly identify which activities need to be addressed versus those they have already acknowledged. The other status options do not specifically relate to the absence of the star icon; for example, a status of "Closed" would indicate completion regardless of whether the activity was viewed, while "Overdue" would imply a separate urgency based on timing. Thus, the correct answer aligns with the context of acknowledging status transitions based on user interaction with the activity.