Final answer:
The term that refers to the mature resolution of the identity crisis is integrity.
Step-by-step explanation:
The term that refers to the mature resolution of the identity crisis is integrity. According to Erikson's psychosocial theory, the final stage of development in late adulthood is characterized by the challenge of integrity versus despair. People who successfully navigate this stage feel a sense of satisfaction and embrace their life's accomplishments with few regrets. However, those who are unsuccessful may experience feelings of bitterness and despair.