Fish, amphibians, reptiles birds and mammals have similar emus. They all start with gills slits fish, and some amphibians grow to have gills some amphibians reptiles birds and mammals, develop lungs to breathe air. They all start with tells fish some amphibians reptiles and birds grow humans do not keep their tails fish and reptiles skills, amphibians, birds, and humans have skin birds, have feathers, and humans have hair, with which animal do humans exhibit the most LINEAR relationship?

Humans exhibit the most linear relationship with mammals, as both have hair and give birth to live young, making them closely related in terms of evolutionary traits.