Answer :
D. Backbones.
All of the animals listed are vertebrae, a classification of animals that means they have backbones. Fish do not have legs, lungs, or hair, and birds lack hair as well.
All of the animals listed are vertebrae, a classification of animals that means they have backbones. Fish do not have legs, lungs, or hair, and birds lack hair as well.
D.) backbones
Fish don't have legs nor hair nor lungs (they have fins,scales,and gills)
Though all of them do have backbones
Fish don't have legs nor hair nor lungs (they have fins,scales,and gills)
Though all of them do have backbones