Question

a wavelength is
how tall the wave is from rest
the frequency of the wave
a measurement of one full wave
rewatch skip

Explanation:

Wavelength is defined as the distance between two consecutive identical points on a wave (such as from crest - to - crest or trough - to - trough), which is equivalent to a measurement of one full wave. "How tall the wave is from rest" refers to amplitude. "The frequency of the wave" is the number of waves passing a point per unit time.

Answer:

A measurement of one full wave