Sound waves are similar to the waves

Sound waves are mechanical longitudinal waves that propagate through a medium via successive compressions and rarefactions [1]. In a longitudinal wave, the displacement of the medium's particles is parallel to the direction of wave propagation. Moving a piston up and down in an air-filled pipe creates these exact pressure variations, generating longitudinal sound waves [3]. In contrast, laser light and mobile phone tower signals are electromagnetic waves, which are transverse in nature and do not require a material medium [1]. Similarly, plucking or hitting a stretched wire generates transverse waves, where the particles vibrate perpendicular to the direction of energy flow [3]. Therefore, the wave motion in an air-filled pipe with a moving piston is the only option that matches the longitudinal characteristic of sound waves in air.

Sources

1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 5: Earths Magnetic Field (Geomagnetic Field) > Why Do Sound Waves Travel Faster In A Denser Medium Whereas Light Travels Slower? > p. 64
2. [3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 20: Earths Atmosphere > Why Are Microwaves And Some Radio Waves Not Reflected By The Ionosphere? > p. 278