Whats it called when a force can change the shape of an object?

Force applied causes deformation in the object. It changes the relative positions of constituent particles in the crystal lattice.
As soon as that happens, the interatomic or intermolecular forces come into play and they, tend to restore the solid back to it's original shape.

This restoring force per unit area is called Stress . When external forces are removed, the internal forces tend to restore the solid back.
This property is called Elasticity .

However, no material is perfectly elastic and what happens is that, the body is not able to restore itself completely.

Explanation: Blowing is a kind of force (push). Force can change the shape and size of an object. Example: shape or size of a spring changes on pulling or pushing it. Pulling increases it’s length while pus

ing decreases it’s length.

vapour or gas assuming atmospheriv pressure