A reinforcer is a stimulus that increases the probability that the behavior will occur again. An example of a reinforcer would be a dog treat. If you want your dog to follow the command "sit", you would follow the behavior with a dog treat, or reinforcer, to ensure that the behavior of "sit" would occur again.
erikson's psychosocial development theory contains eight stages. hope this helped!
He requested a favor to rule the people or be his successor.