Answer:
Option A
Step-by-step explanation:
The more elasticity the medium has, the more speed the sound travels. The density of steel is more than air because molecules are closer together in solids than in liquids or gas.
In general, sound waves in steel travel 17 times faster than through air. The speed of sound is determined by the dynamic propagation of sound waves. The speed of sound depends on elasticity and density and here both the elasticity and density of steel are more than air.
Hence, "The speed of sound in steel is greater than it is in the air because steel is more elastic than air".