Final answer:
Mother Teresa's selfless service to others exemplifies agape love, which is characterized by unconditional and altruistic concern for the well-being of others.
Step-by-step explanation:
The activities of Mother Teresa, who gave so much with no expectation of being repaid, can best be described as agape love. Agape love is a selfless, unconditional, and altruistic form of love. It is not based on personal gain or reciprocation but on a genuine concern for the well-being of others. In contrast, eros refers to romantic love, philos refers to brotherly love or friendship, and ego refers to a self-centered kind of love. Mother Teresa's actions exemplify agape love as she helped others solely based on empathy and compassion without any expectation of personal benefit.