Answer
When an event occurs in Tkinter, the event-handling function that is associated with that event is automatically passed an argument that represents the event. This argument is often referred to as the "event object".
Work Step by Step
The event object provides information about the event, such as the type of event, the widget that generated the event, and the location of the event (e.g., the mouse position). This information can be used by the event-handling function to determine how to respond to the event.
For example, when a mouse button is clicked, the event-handling function will receive an event object that represents the mouse click event. The function can then use the information in the event object to determine what action to take.