Which option correctly changes the given sentence about sound waves?

The choice to change "variable" to "uniform" is correct because it addresses how sound waves can behave in various mediums. Sound waves can differ based on the environment they travel through, which means they may not always be consistent. When we describe sound waves as "variable," we recognize their ability to change depending on factors such as temperature, pressure, and density of the medium. By altering "variable" to "uniform," the sentence would imply that sound waves maintain a consistent behavior or property across different conditions, which can misrepresent the nature of sound waves as they are typically influenced by external variables. This change provides clarity and precision to the understanding of sound wave behavior, reflecting a fundamental principle of wave dynamics in physics.