Which command on the insert tab of the powerpoint online application is used to add a venn diagram or process chart to a presentation?

The correct answer is: SmartArt.

Explanation:

In Microsoft PowerPoint, the "Insert" tab includes many features such as "Table", "Images", "Forms" or "SmartArt". "SmartArt" allows users to insert diagram, process, cycle, hierarchy, relation, matrix, and pyramid schemes so that the presentation is more dynamic. Information can be added to those schemes so the audience can easily review it.