Final answer:
The characteristic that is not a trait of stars is C) texture. Stars vary in size, temperature, and color, but as gaseous bodies, they do not have a texture.
Step-by-step explanation:
The characteristic that is NOT a trait of stars is C) texture. Stars, being massive balls of gas undergoing nuclear fusion, do not have a texture that can be felt or quantified like solid objects. The other options, size, temperature, and color, are all characteristics of stars. Stars vary in size from small dwarf stars to massive supergiants. The temperature of a star affects its color and its position on the Hertzsprung-Russell diagram, a fundamental tool in stellar astrophysics. The color of a star is an indicator of its temperature, with the hottest stars appearing blue or blue-white, and the coolest stars appearing red.