The term 'LEANS' on (pressures) refers to the tendency of a material to deform when subjected to an external force. This phenomenon is known as deformation and is caused by the application of a force that causes the material to bend, stretch, or compress. The amount of deformation depends on the magnitude of the force and the material's ability to resist it. In general, materials with higher elasticity are more resistant to deformation than those with lower elasticity.