Question

what does the speed of sound depend on?
acoustics
frequency of the sound
medium that the sound travels through
loudness of the sound

Explanation:

The speed of sound depends on the medium it travels through. Different mediums (solids, liquids, gases) have different properties (like density and elasticity) that affect how fast sound waves propagate. Acoustics is the study of sound. The frequency of sound affects pitch, and loudness is related to amplitude. Neither frequency nor loudness directly determines the speed of sound.

Answer:

medium that the sound travels through