Which best explains how rotation affects the colors we see in the sky at dawn and dusk?
A. As dawn and dusk, the light from the Sun is fading and phases through all the colors of a prism in a cycle.
B. At dawn and dusk the rotation of Earth slows down so the light from the increased sunlight creates colors.
C. At dawn and dusk, sunlight is closer to Earth’s curved surface, refracting in the atmosphere, creating colors.
D. At dawn and dusk, Earth has rotated closer to the Sun, so the heat creates the colors in the sky.
I think that the answer is D.)
It makes the most sense because one or two of the other options talk about the sun getting closer to the earth which makes no sense. Also, the Earth's spinning speed does not slow down so that rules out option B. Lastly, the answer cannot be A whereas the sun's light does not fade, rather the Earth spins with a shadow casting over its back due to no sunlight on that facing side.
Hope this helps and have a nice day.