Which of the following is an example of user interactivity you can add with Adobe Express?

A link to YouTube exemplifies user interactivity that can be integrated into content created with Adobe Express. This feature allows users to engage actively with the graphic or design by clicking on the link to watch a video. Including such interactive elements enhances viewer experience, making it possible for creators to direct audiences to additional resources, tutorials, or related content that enriches the overall message or purpose of the design.

In contrast, a static image presents no interactive features, as it simply serves as a visual element without any action or engagement from the viewer. A watermark is primarily used for branding or copyright protection and does not facilitate interaction. Similarly, a copyright notice serves a legal purpose but is not intended to engage users interactively. Thus, among the options provided, only a link to YouTube effectively promotes active participation from users, making it the correct choice.