Answer:
c) scattered light
Step-by-step explanation:
The redness of sunsets and the color of blue skies is due to the scattering of light by the air molecules in the atmospheres.
The blue sky is due the phenomenon called Rayleigh scattering. The light with less wavelength will be scattered more. So, the blue light which has less wavelength is scattered more.
During sunset and sunrise, the sunlight has to travel farther through the atmosphere. As most of the blue light is scattered away, only red light reach our eyes. So, the sky looks red during the sunset and sun rise.