Final answer:
The answer is A. Popup Dialog, which displays an important notification with a title, message, and buttons like confirm and cancel while using an app.
Step-by-step explanation:
The correct answer to this question is A. Popup Dialog. A popup dialog is a small window that appears in the foreground of the user interface to display an important notification to the user while they are using an app. It can contain a title, message, and buttons such as a confirm and a cancel button, which allows the user to make decisions or take actions in response to the notification. This is different from a Snackbar or Toast Notification, which provide brief messages at the bottom of the screen without interrupting the user experience and without offering buttons for immediate action. The Status Bar, on the other hand, shows basic system information and is not used for interactive notifications.