Answer:
By identifying the bones as being homologous structures and by proposing that humans, bats, and dolphins share a common ancestor.
Explanation:
The answer is going to be c. hope that helped
The best way to do a observation can be a microscope or by taking notes ,and by , taking pictures or, asking questions about the subject that you and the teacher or you, your teacher and the class is talking about .! Hope this helps ..
