Which term is described as the height of a wave from its rest position to its crest?

a. wave height

b. wavelength

c. crest height

d. amplitude

So we want to know what is the physical term that describes the height of a wave from its rest position to its crest. The amplitude is the distance from the rest position of a wave to the crest of the wave. That is also half the distance from the trought to the crest. So the correct answer is d. amplitude.