Which feature of a wave determines its color in the visible spectrum?

The correct answer is:

D.wavelength

Explanation:

In physics, the wavelength is the spatial time of a periodic wave range over which the wave's shape repeats. It is thus the inverse of the spatial frequency.In fact, the color of obvious light depends on the wavelength of the wave. The visible light color goes about from wavelength of 380 nm (corresponding to violet light) to 750 nm (corresponding to red light), and the various colors in between compare to different wavelengths.