What are called mechanical waves? Give its examples.

(N/A) Mechanical waves are waves that require a material medium (solid,liquid,or gas) for their propagation. These waves are produced due to the periodic disturbance in the medium,which causes particles to oscillate about their mean positions.
Examples of mechanical waves include:
$1$. Sound waves traveling through air.
$2$. Waves produced on a stretched string.
$3$. Water waves on the surface of a pond.
$4$. Seismic waves (earthquake waves) traveling through the Earth's crust.