Final answer:
The psychosocial stage that appears in adulthood is 'integrity vs. despair', where older adults reflect on their life and feel either a sense of satisfaction (integrity) or failure (despair).
Step-by-step explanation:
The stage of psychosocial development that appears in adulthood rather than in childhood is b. integrity vs. despair. This occurs during late adulthood, and it involves reflecting on one's life and feeling either a sense of satisfaction, known as integrity, or a sense of failure and disappointment resulting in despair. According to Erik Erikson's stages of psychosocial development, this stage is critical for older adults as they look back over their lives and assess their accomplishments and regrets. Success in this stage leads to a sense of fulfillment and well-being, while failure can result in depression and feelings of bitterness.