Which three characteristics describe the energy of a wave?
a. frequency, the crest, and the trough
b. wavelength, amplitude, and frequency
c. speed, amplitude, and medium
d. frequency, wavelength, and medium

The correct answer is "wavelength, amplitude, and frequency"

Explanation:

The energy of a wave can be described by: wavelength, amplitude and frequency.

Wave consists of crests and troughs. The lowest point on the wave is called troughs. The highest point on the wave is called crests.

Wavelength: It is the horizontal distance between the two consecutive crests or troughs in the wave.

Amplitude is the maximum vertical displacement or It is the vertical displacement fro crest to central axis of the wave. Energy of the wave is directly proportional to the square of the amplitude. Higher the energy of the wave, more will be the amplitude of the wave.

Frequency is defined as "how many waves are passing through a fixed point per second.

The frequency and the wavelength have an inverse relation between them.

Therefore, the correct option is (B).