Question

which term defines the distance from rest to crest, or from rest to trough?
frequency
speed
amplitude
period

Explanation:

In wave - related concepts, amplitude is the maximum displacement from the equilibrium (rest) position to either a crest or a trough. Frequency is the number of waves passing a point per unit time. Speed is the rate at which the wave travels. Period is the time taken for one complete wave cycle.

Answer:

C. amplitude