Final answer:
Nina's act of returning the wallet demonstrates Virtue morality, as she is motivated by the virtue of honesty and consideration for others.
Step-by-step explanation:
Nina's act of returning the wallet because she doesn't want the person who lost it to be inconvenienced demonstrates Virtue morality. Virtue ethics focuses on character and the development of the right habits or traits, and Nina's action aligns with the virtue of honesty and consideration for others. In contrast, Utilitarian morality emphasizes producing the greatest amount of pleasure for the greatest number of people, Kantian morality focuses on duties and rules, and Ethical Egoism prioritizes self-interest.