The point B represent the crest of the wave. The crest is the peak of the wave. While the trough is the lowest.
What is wavelength?
The distance between two successive troughs or crests is known as the wavelength.
The wavelength is also defined as the distance between two locations in a wave that have the same oscillation phase.
The point B represent the crest of the wave. The crest is the peak of the wave. While the trough is the lowest.
Hence, option B is correct.
To learn more about the wavelength, refer to the link;
brainly.com/question/7143261
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