Question

which of the following best describes amplitude?
amplitude is how fast a wave travels.
amplitude is how far a wave moves from its resting position.
amplitude is the resting position of a wave.

Explanation:

Amplitude is defined as the maximum displacement or distance moved by a wave from its equilibrium (resting) position. The first option describes wave speed (related to frequency and wavelength), and the third option incorrectly defines amplitude as the resting position itself.

Answer:

Amplitude is how far a wave moves from its resting position.