The correct option is (c).
Explanation
Sound is a form of energy that propagates as a mechanical wave through a material medium (solid, liquid, or gas). The propagation involves the transfer of energy from one point to another without the actual physical transfer of matter.
Statement-wise Analysis:
- Statement 1 is Correct: Sound travels as a wave. Specifically, it is a longitudinal wave characterized by regions of compression (high pressure) and rarefaction (low pressure) moving through the medium.
- Statement 2 is Incorrect: In wave propagation, the disturbance moves forward through the medium. The medium itself does not move bodily from the source to the receiver. The statement incorrectly suggests the medium moves while the disturbance stays stationary, which is the opposite of wave mechanics.
- Statement 3 is Correct: The particles of the medium do not travel from the source to the destination. Instead, they oscillate back and forth about their mean (equilibrium) positions. This vibration transfers energy to adjacent particles, allowing the wave to propagate.
Key Takeaway:
Sound waves involve the transport of energy (the disturbance) through the oscillation of medium particles, not the physical transport of the medium itself.