Which intermolecular force is most responsible in allowing xenon gas to liquefy?

Xenon is an inert gas. Its liquefaction is due to instantaneous dipole-induced dipole interactions.

The intermolecular force most directly responsible for xenon gas's ability to liquefy is instantaneous dipole-induced dipole.
A non-polar gas, xenon. One Xe molecule instantly produces a dipole that causes a second Xe molecule to experience a dipole.