Answer:
a) operant conditioning is a method for learning based on punishment or rewards to change or learn certain behaviors.
b) Sean is using punishment, such as grounding and taking away valuable things, and Tanya is using reinforcement, like taking him for ice cream and praising him.
c) Sean could settle with Ben an deal on, for example, 30 minutes of television before bedtime, counting that he would go to bed imediatelly after the 30 minutes ended and it was bed time.