The correct answer would be, Solid, liquid and gases.
A longitudinal wave such as a sound wave can travel through solids, liquids and gases.
Explanation:
When particles in a wave move parallel to the direction of the wave propagation, then this wave is called as the longitudinal wave.
Longitudinal waves are the waves that can travel through solids, liquids and gases, but transverse waves are the ones that can travel only through the solids.
Longitudinal waves like sound wave can travel through mediums like, water, air, wood, bricks, etc. We can see in the daily life, when we talk, our sound reaches the people by traveling through the air, or in water, or besides the walls, etc. Such sound waves are actually the longitudinal waves.
Learn more about Longitudinal wave at:
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