Final answer:
The statement that is true is A: As the color of light changes, the wave frequency changes, due to the inverse relationship between color and frequency. Amplitude is not related to the color of light, and the statement about events sharing a color attribute is not relevant to the physics of light.
Step-by-step explanation:
The true statement is A: As the color of light changes, the wave frequency changes. This is because color is determined by the frequency (and thus wavelength) of light. In physics, the relationship between wave frequency and color is an established concept. As the light's color changes, from red to violet for instance, the frequency increases, and the wavelength decreases according to the equation c = λf, where c is the speed of light, λ is the wavelength, and f is the frequency. The speed of light remains constant in a vacuum, so any changes in the wavelength result in inverse changes to the frequency. For example, blue light has a shorter wavelength and higher frequency than red light.
It is important to note that amplitude is not related to color but to the brightness of the light. Option B is incorrect as color and amplitude are independent properties of light waves. Option C is somewhat redundant as changing the 'color of light' inherently refers to the 'color of the wave,' and option D is incorrect because events do not share a color attribute. Moreover, the wavelength and frequency of light are inversely related - as one increases, the other decreases, consistent with the equation v = fλ.