Question

pitch is to frequency as _________.
peak is to wave
frequency is to amplitude
high is to low
loudness is to amplitude

Explanation:

Pitch is a perceptual property related to the frequency of a sound wave. Similarly, loudness is a perceptual property related to the amplitude of a sound - wave. A peak is just a part of a wave, frequency and amplitude are different characteristics of a wave, and high and low are just opposite descriptors not in the same relationship as pitch - frequency and loudness - amplitude.

Answer:

D. loudness is to amplitude