Which wave characteristics is defined as the number of cycles of a periodic wave occurring per unit time?

Answer;

Frequency

Explanation;Waves are disturbances that travel through a material medium. There are several characteristics of waves, which includes; wavelength, frequency, period and amplitude. Amplitude is the maximum displacement of wave particles, or simply the height of the wave, measured in meters. Wavelength is the distance between adjacent crests or troughs in a transverse wave or between two successive rarefaction or compressions in a longitudinal wave, measured in meters. Period is the time it takes for one complete wave to pass a given point, measured in seconds.Frequency is the number of complete waves or cycles that pass a point in one second, measured is inverse seconds, or Hertz (Hz).

Ithink d is the right answer. hope this !