Due to which of the following reasons does the change in colour of stars occur?

Options :
  1. Variation in their distance from the earth.
  2. Variation in their surface temperature.
  3. Fluctuations in their composition and size.
  4. Irregular absorption or scattering in earth's atmosphere.
Answer and Explanation :-

Answer: Option 2

Explanation:

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God surely did not create us, and cause us to live, with the sole end of wishing always to die. I believe, in my heart, we were intended to prize life and enjoy it, so long as we retain it. Existence never was originally meant to be that useless, blank, pale, slow-trailing thing it often becomes to many, and is becoming to me, among the rest.
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