Why intermolecular force of NHL is gravity?

The intermolecular force in liquid helium (NHL) is not gravity; rather, it is primarily due to van der Waals forces, which are weak attractions between molecules. Gravity acts on all matter and influences the overall behavior of substances, but it is not classified as an intermolecular force. Instead, intermolecular forces are responsible for the physical properties of substances, such as boiling and melting points, while gravity affects the macroscopic behavior of materials and their interactions with the environment. In the case of NHL, the weak van der Waals forces facilitate its unique properties at low temperatures.