What is the primary difference between augmented reality $($AR$)$ and virtual reality $($VR$)$ as explained in the video?

Question $11$ options:

AR creates an entirely virtual world, while VR overlays digital content onto the real world.

AR enhances sensory perception, while VR simulates a virtual environment.

AR completely immerses the user in a virtual world, while VR allows the user to remain connected to the real world.

AR requires head$-$mounted devices, while VR can be used with AR$-$compatible smart devices.