The correct option is (D) SOLIDS.
The speed of sound is greatest in solids and decreases as it moves from solids to liquids and liquids to gases. A vacuum cannot conduct sound. Sound travels at different speeds depending on the medium through which it passes. The speed of sound is also affected by temperature.
- When a vibration begins, the solid molecules collide immediately, and the compression wave travels quickly.
- The speed of sound is the distance travelled by any sound per unit of time.
- When the medium is dense, the molecules are tightly packed, implying that sound travels faster.
- As a result, as the medium density increases, so does the speed of sound.