Final answer:
The term 'Utang na loob' refers to the Filipino cultural concept of a debt of gratitude, where one feels an obligation to repay someone who has granted them a favor, with the repayment not being strictly defined.
Step-by-step explanation:
The obligation to repay a person for whom one has received a favor with undefined quantification is Utang na loob (debt of gratitude). This is a cultural concept common in the Philippines, which reflects a deep sense of gratitude one owes to someone who has helped them. It represents an internal commitment to repay this person in the future, though the manner or quantity of repayment is not defined. The concept goes beyond material debt and touches on moral, social, and emotional aspects of human relationships.
Unlike the Western concept of 'quid pro quo', utang na loob is more about maintaining harmony and strong interpersonal bonds within the community. Other options such as Kapwa (shared identity), Bahala na (come what may), and Hiya (shame) represent different aspects of Filipino social and psychological values but they do not specifically describe the responsibility of repayment felt for receiving a favor.