Final answer:
Amelia's transition into adulthood might be celebrated by coming-of-age ceremonies or rites of passage, which are cultural rituals that signify her new status. In the modern context, milestones like graduation or marriage can also acknowledge this transition, symbolizing her roles and responsibilities as an adult.
Step-by-step explanation:
Amelia is sexually mature and has assumed adult responsibilities and status. This transition might be celebrated by various social and cultural rituals that mark the entry into adulthood. Many societies have distinct rites of passage that symbolize this transition and recognize the new social roles and responsibilities that come with it. For example, some cultures have coming-of-age ceremonies or rites of passage that can include parties, religious ceremonies, or other formal events.
In contemporary Western societies, this transition may not have a formal ceremony, but significant life events like graduation, marriage, or starting a career can be seen as informal celebrations of becoming an adult. As adulthood progresses, social roles often involve forming a family, emphasizing commitment and responsibility, and focusing on professional development.