What type of content can you add to a slide to make it interactive?

To enhance interactivity in a presentation, adding a link to a form is highly effective. This allows viewers to engage with the content actively rather than just passively absorbing information. By linking to a form, you can encourage audience participation, gather feedback, or conduct polls in real-time, elevating the overall learning experience.

In contrast, a static image does not invite interaction; it merely serves as a visual element without engaging the audience. Instructions to guide completion of a work piece, while informative, do not actively involve the audience in the same manner a link to a form does. The option that mentions "none of the above" is also not accurate in this context, as linking to a form clearly represents a means to foster interactivity. Thus, the most effective approach to creating interactive content is indeed by adding a link to a form.