Archaeopteryx fossils show that the animal had feathers like a bird. it also had a bony tail, teeth, and claws on its wings like a reptile. scientists claim this is evidence of a common ancestor. what makes this a sound claim? a. birds and reptiles are warm-blooded organisms. b.archaeopteryx fossils share traits with both birds and reptiles. c.reptile species show evolutionary advantages over birds. d.fossils of birds, archaeopteryx, and reptiles were found together.

The correct answer is- .b.Archaeopteryx fossils share traits with both birds and reptiles.

Archaeopteryx was a primitive bird that had feathers, but its skeleton looks like a  small dinosaur ( which belonged to reptiles). It had a bony tail, teeth, and claws on its wings, resembling a reptile, which have made scientists claim that Archaeopteryx fossils share traits with both birds as well as reptiles.  

Due to this, it is considered as a missing link between reptiles and birds.

Thus, option B) is the right answer.