Concept:A mechanical wave requires a material medium to transfer energy through the vibration of particles.
Explanation:Mechanical waves are produced when particles of a medium oscillate and pass energy from one particle to the next.
They cannot travel through a vacuum because they need matter to propagate.
Common examples include sound waves, water waves, and seismic waves.
Water waves involve the up-and-down motion of water particles, so they are mechanical waves.
Radio waves, X-rays, and light rays are electromagnetic waves.
Electromagnetic waves do not require any medium and can travel through empty space.
Therefore, among the given options, the only mechanical wave is water waves.
Answer:A. water waves