A prisoner is violent and hostile, although he wasn't always this way. his therapist believes that the environment the prisoner was raised in brought about his aggressive tendencies. the therapist is espousing the view that behavior is primarily influenced by

In the behavioral development of nature vs nurture, the prisoner would fall under nurture as the therapist believes it was the environment he was raised in. If the prisoner was predisposed to aggression when he was younger, it might have influenced him to be such a way now.