Answer:
empathy and sympathy
Explanation:
Billy’s prosocial behaviour is strongly related to Billy’s experience of empathy and sympathy what he gets from his babysitter.
Prosocial behaviour: This is defined as the purpose to benefit others.
The prosocial behaviour is a social behaviour for the welfare of society or people in a society as a whole, like sharing, donating, helping, volunteering, and co-operating.
In prosocial behaviour, individual differences occur and caused by socialization, a combination of heredity, and situational factors.