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The characteristic of stars that primarily determines a star's color
is temperature. The correct
answer between all the choices given is the third choice. I am hoping that this
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Answer:

Temperature

Explanation:

The colour of a star determines by its temperature.

According to the Wein's displacement law,

The wavelength of maximum intensity of emission is inversely proportional to the absolute temperature of the black body. Wavelength corresponds to the colour of light emitted by the star.

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