Which of the following can be displayed in a List view?

The correct answer highlights that icons can be displayed in a List view. In Appian List views, icons serve as visual elements that can enhance the appearance of list items or represent statuses, actions, or categories clearly. They help create an intuitive interface, allowing users to quickly identify the type of information presented in the list.

While other elements like progress bars or photos could be visualized in different contexts or interfaces, or in combinations outside of standard List views, icons are specifically designed to be used within this type of view to give immediate recognition to data points. Text, although possible in List views, is not the focus here as it primarily informs rather than visualizes in the way icons do.