What is luster in the context of rabbit fur?

Luster in the context of rabbit fur refers to the brightness or brilliance of the fur. This quality is important as it indicates the overall health and condition of the rabbit's fur. A shiny, glossy appearance is often a sign of well-maintained fur, which can be influenced by factors such as diet, grooming, and general care of the rabbit. Luster contributes to the aesthetic appeal of the rabbit and can be a distinguishing factor in breed standards, making it a significant characteristic for breeders and judges at events like fairs.

The other options focus on different aspects of fur: thickness refers to how dense the fur is, length pertains to how long the individual hairs are, and softness relates to the texture of the fur. While these attributes are also important when evaluating rabbit fur, they do not define luster, which is specifically concerned with shine and reflectivity.