Final answer:
Apps are displayed in separate windows for easy movement and multitasking in Windowed Mode, which is suited for keyboard and mouse or touchpad use, unlike Tablet Mode, Presentation Mode, or Full Screen Mode.
Step-by-step explanation:
In the context of operating systems, the Windowed Mode allows apps to be displayed in separate windows that can be moved around, resized, and organized according to the user's preference. This mode is particularly suited for use with a keyboard and mouse or touchpad.
It is not the Tablet Mode, which is designed for touch interaction and usually displays apps in full screen or splits the screen between two apps; nor is it Presentation Mode, which is intended for displaying presentations, often on an external display. Finally, it is distinct from Full Screen Mode where each application takes up the entire screen.
Therefore, apps are windowed in Windowed Mode to facilitate the ease of movement and multitasking typically associated with traditional desktop computing.
Therefore, the correct answer is 4) Windowed Mode