Pollution is always a good way to go but you don't have to do air pollution you can do water pollution or both air and water pollution.
<span>The right option is <span>B) Combination of all the wavelengths of visible light
</span><span>White light is formed when there is mixture of all the colors of the visible light spectrum (ROYGBIV). White light is perceived when all the wavelengths of the visible light spectrum strike the eye at the same time. The sensation of white is not the result of a single color of light.
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Resonance is the quality of the voice that is produced from sound vibrations in the pharyngeal, oral, and nasal cavities.
Hope this helped, have a great day! :D