The maximum sound propagation occurs in:

The dynamic propagation of sound waves is defined as the speed of sound.

This is determined by the characteristics of the medium in which the propagation occurs. The term "speed of sound" refers to the speed of sound waves in an elastic medium. When the medium is dense, the molecules are packed tightly together, allowing sound to travel faster.

Then, as the density of the medium increases, so does the speed of sound.

As a result of the preceding discussion, we can deduce that the velocity of sound varies in different mediums, as shown below.

air, liquid, and In solids, sound travels at a faster rate than in vacuum. Because the molecules in steel are compact and dense, sound travels faster in steel.

Sound travels at a faster rate through denser media. The solid density is higher than the densities of air, liquid, and vacuum.

The sound velocity in vacuum, gas, liquid, and solid media.

4 is the correct answer.