Which of the following characteristics of stars is affected by a stars temperature?

1. Brightness

2. Color

3. Distance from Earth

4. Size

(2) Color

Explanation:

The color--the wavelength of the visible waves emitted by a star- - is tied to the star's temperature. In general, the hotter the surface the shorter the emitted wavelengths (and the stronger will the blue component be represented in the visible band), and the cooler the surface the longer the wavelength (with a shift toward the red end of the visible band).