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The example of a longitudinal wave among the options provided is:
- The rumbling sound from a tractor
A longitudinal wave is a type of wave where the particles of the medium vibrate parallel to the direction of the wave's propagation. In the case of the rumbling sound from a tractor, the compression and rarefaction of air molecules that produce the sound travel in the same direction as the sound wave itself, making it an example of a longitudinal wave.
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