Respuesta :
Natural selection and variation are the terms used to show change and adaptation. Variation in the beak of the birds shows that they had common ancestors. Thus, option B is correct.
What are evolution and natural selection?
Evolution is a process that continues in the change of the organism and is a part of survival. The species with better trait quality are preferred over and selected for survival.
The process of natural selection plays a major role in the evolutionary process. As the birds adapted different beak shapes because of the varied conditions so that they could survive shows shared a common ancestor.
Therefore, option B. the species once had a common ancestor.
Learn more about evolution here:
https://brainly.com/question/12051929
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