Question

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

Explanation:

Amplitude is defined as the maximum displacement or distance moved by a wave from its equilibrium (resting) position. The first option describes the equilibrium position itself, not amplitude. The third option describes wave speed (related to frequency and wavelength), not amplitude. Only the second option correctly aligns with the definition of amplitude.

Answer:

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