What constitutes a "pair" in rabbit breeding terminology?

In rabbit breeding terminology, a "pair" specifically refers to a male and a female rabbit. This classification is essential because breeding involves the intentional pairing of a buck (male) and a doe (female) to produce offspring. The combination of these two distinct genders is critical for reproduction, and thus it is this pairing that is recognized as a "pair" in the context of breeding.

The other choices present concepts that do not align with the standard definition of a breeding pair. Having two rabbits of the same age does not ensure that they are of different sexes necessary for breeding. Similarly, two rabbits competing in a category focuses on competition rather than reproductive purposes, and two unrelated rabbits might not necessarily include both genders required to constitute a breeding pair. Therefore, option relating to male and female rabbits captures the essence of breeding terminology correctly.