A characteristic that best exemplifies the evolutionary advancement of mammals over other vertebrates is the

Explanation

Viviparous mode of reproduction is a better way to distinguish mammals from other vertebrates than paired limbs. Mammals are viviparous, meaning they give birth to live young. Mammals have many traits that make them evolutionarily advanced, including Viviparous mode of reproduction, possession of paired limbs, Warm-bloodedness, Complex brains, Mammary glands, Efficient circulation, Secondary palate, Highly adaptable teeth,Sensitive ears, Stronger bites, Musculoskeletal systems etc. However, despite the fact that viviparity is not only peculiar to mammals as some snakes, lizards and fishes also give birth to live young ones, the characteristics that best exemplifies the evolutionary advancement of mammals is viviparity mode of reproduction.