Answer: Stories told by her family
Step-by-step explanation:
Details memory is the memory that contains information about events, facts and situation in descriptive and recognizable manner. This memory can easily revive about events through remembering.
According to the question, Jamie is able to have detailed memory of her first birthday due to the stories that family usually tells her that how the party went and happened .This makes her know and remember details of her dressing, event and cake of that day.