Which of the following is a characteristic of lagomorphs such as rabbits?

A characteristic of lagomorphs, which includes rabbits, is that they have a single pair of incisors in the upper jaw. This unique dental structure is an important identification feature that differentiates lagomorphs from other mammals, particularly rodents, which have two pairs of upper incisors. The single pair of upper incisors in lagomorphs is adapted for their herbivorous diet, allowing them to efficiently gnaw plant material.

While lagomorphs are known to display varying activity patterns, it is not accurate to categorize them as exclusively nocturnal, as many are diurnal or crepuscular (active during dawn and dusk). Additionally, while some lagomorphs do dig burrows, not all species exhibit this behavior, and it is not definitive of the entire group. Lastly, while rabbits do make popular pets, the idea that they are more likely to be kept as pets than rodents is a subjective comparison and not a defining characteristic of lagomorphs themselves.