Question

what is wavelength?
the measurement of energy a wave carries
the distance that a wave can travel
the distance between two crests on a wave

Explanation:

Wavelength is a fundamental concept in physics. It is defined as the distance between two consecutive points (such as crests or troughs) on a wave that are in phase. This is a key characteristic used to describe waves, whether they are light waves, sound waves, or other types of waves.

Answer:

The distance between two crests on a wave