Answer: transitions occur at the beginning of each era or stage.
Step-by-step explanation:
In Daniel Levinson´s comprehensive theory of adult development, there are 6 stages of adulthood, known as the Seasons of a Man's Life: Early adult transition (17-22), Entering the adult world (22-28), Age 30 transition (28-33), Settling down (33-40), the Mid-life transition (40-45), and Entering middle adulthood (45-50). In this model, there´s a stable period in which people make fundamental life decisions, and the Transitional Period, when we come to the end of a stage and start a new one.