Final answer:
Altruism is the selfless concern for others' well-being, while prosocial behavior encompasses voluntary actions aimed at helping others. In the 12-step program, altruistic activities are often recommended for personal recovery and supporting others.
Step-by-step explanation:
Altruism is the belief in or practice of disinterested and selfless concern for the well-being of others. It is a pure form of helping others out of empathy, regardless of the costs or benefits involved. Prosocial behavior is the voluntary behavior with the intent to help other people, and it can include altruistic activities. In the context of the 12-step program, altruistic activities are often recommended as a way to aid in one's own recovery and to support others in their journey towards sobriety.