Which of the following is related to the amount of energy that a sound wave carries?

The correct choice is related to the concept of amplitude in sound waves. Amplitude refers to the maximum displacement of points on a wave and is directly associated with the energy carried by the wave. In the context of sound, a higher amplitude means that the sound wave carries more energy, resulting in a louder sound. Conversely, a lower amplitude indicates less energy and a quieter sound.

Other options like wavelength, frequency, and pitch, while important characteristics of sound waves, do not directly describe the energy content of the wave. Wavelength is the distance between successive crests or troughs of a wave, frequency refers to the number of complete cycles of the wave that occur in a second, and pitch relates to what we perceive as the highness or lowness of a sound, which is more closely connected to frequency than energy. Therefore, amplitude is the parameter that specifically indicates the energy level in sound waves.