Answer:
The correct answers are: "identical", "different", "genetic", and "coincidental"
Step-by-step explanation:
Twin studies are helpful to investigate the degree of influence that inheritance and environmental factors have in traits such as personality. Two identical twins raised under very different circumstances are very interesting cases of study, because if they show similar personality traits it would suggest that genetic plays an important role in the development of personality. However, critics of twin studies argue that identical twins obviously are the same age, therefore it could be coincidental that they could share some personality traits.