How does sound travel?

Sound travels in waves, which are mechanical disturbances that propagate through a medium such as air, water, or solids. The correct interpretation here is that sound waves can indeed reflect off hard surfaces, leading to phenomena such as echoes. This reflection means that sound can travel in multiple directions, and the characteristics of the surface it hits will affect how the sound is reflected.

While sound does move through air in the form of waves, it doesn’t exclusively travel in straight lines. The environment and barriers can alter the direction of the sound waves due to reflections. Moreover, options that mention sound traveling through vacuum or in the form of electrical signals reference different concepts. Sound cannot travel through a vacuum since it requires a medium to propagate. Electrical signals represent information transfer and are not the same as sound waves themselves. Thus, the understanding of sound traveling as reflected waves gives a more comprehensive insight into its behavior in real-world applications.