How does size influence the appearance of a star? Give an example in your response.

Answer is: when the size of a star increases, luminosity of star also increases.

The color of a star is decided by the surface temperature of the star and t he temperature of a star depends on the size of star.

The smaller stars have low temperature and they are usually red (Proxima Centauri - red dwarf star).

The massive stars have higher temperature and they are usually blue (for exaple Zeta Puppis - Blue supergiant star).