What role do hand controllers play in the virtual reality $($VR$)$ experience?

They provide an interface for interacting with the VR environment and help track and improve position and orientation accuracy.

They are an optional accessory, functioning as a convenience in a VR environment rather than an experience enhancement.

They provide a sense of balance for a user in the physical environment to help avoid motion sickness in the VR environment.

They are designed to enhance the VR experience by providing haptic feedback so that the user can feel VR objects.

I don't know this yet.

$\sqrt[\phantom{2}]{7}$ : Give feedback on this question