What is a tattoo in the context of rabbit care?

In the context of rabbit care, a tattoo refers to a code that is punched or inked into the rabbit's ear for identification purposes. This practice is commonly used by breeders and show participants to keep track of lineage, breed, and individual characteristics of the rabbits. The tattoo serves as a permanent way to identify each rabbit, ensuring that records are accurate and easily verifiable during competitions or breeding programs.

The other options do not pertain to the established definition of a tattoo in relation to rabbits. Fur texture, symmetry, and tail position are unrelated to identification methods and do not provide the necessary information for tracking individual animals in breeding or showing contexts. Thus, option C is the accurate answer because it directly relates to the identification process critical in rabbit care and competition.