Which VisualForce tag is used to display data from a controller?

The tag used to display data from a controller in VisualForce is apex:outputText. This tag is specifically designed for rendering output data as text on a VisualForce page. By using apex:outputText, developers can reference variables from the controller directly within the tag, allowing for dynamic data presentation. For example, if you have a string or numerical value in your controller, you can display it easily by using this tag.

On the other hand, the other tags serve different purposes. The apex:inputText tag is intended for user input, allowing users to enter text data, which is then sent back to the controller. The apex:page tag defines the overall structure of the VisualForce page but does not display data itself. Lastly, the apex:form tag is used to group related input components but does not directly handle output data from the controller. Thus, apex:outputText is the correct choice for displaying controller data.