What is a dwarf breed in rabbits characterized by?

The characteristic that defines a dwarf breed in rabbits is associated with genetic factors, specifically the presence of dwarf genes. Breeds such as the Netherland Dwarf are specifically bred to exhibit smaller sizes, which are a result of having these two dwarf genes. This genetic composition leads to physical traits prominent in dwarf breeds, including their compact body structure and shorter limbs in comparison to standard-sized rabbits.

In contrast, options that mention large size, common agility, or lifespan do not accurately depict the defining features of dwarf breeds. These characteristics do not apply to dwarf breeds, which are inherently smaller and therefore, their visual and physical traits are not comparable to larger breeds. Thus, the focus on the genetic makeup provides the key understanding to identify dwarf breeds.