Which properties of a medium are responsible for propagation of wave through it ?

Which properties of a medium are required for the propagation of mechanical wave ?

What are the two main properties a material must posses for the propagation of waves through it.

The property of a medium necessary for wave propagation is -

State properties of medium for propagation of mechanical waves.

During propagation of sound wave through air medium

Which property of the medium enables the transverse waves to pass through it?

Which one of the following is a correct pair to list the necessary properties of a medium for the propagation of wave ?