Which of these parameters is directly related to sound frequency? a) wavelength. b) wave velocity. c) sound intensity. d)sound pitch. e)wave amplitude

The answer to the question above is letter "D. sound pitch". This is a perceptual quantity that allows to order the frequency-related values. More commonly, it allows people to classify music as "higher" or "lower" in the sense of musical melodies. 

The Correct Answer is D

Explanation:

Pitch and Frequency represent the identical thing, but from diverse perspectives. While frequency estimates the circular movement of the mechanical waveform, pitch is how large or below it sounds when you listen to it. This is immediately associated with frequency: the greater the regularity of a waveform, the greater the pitch of the sound you listen.