the surface temperature the distance from Earth the distance from the Sun the gases that compose the star
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Stars appear to be blue, white, yellow, and red, even without the aid of a telescope. What causes the different colors of the stars?
Possibilities:
- the surface temperature
- the distance from Earth
- the distance from the Sun
- the gases that compose the star

the surface temperature