Final answer:
Adele named each of her first three albums after her age at the time of their release: '19', '21', and '25'.
Step-by-step explanation:
Adele named each of her first three albums after her age at the time of their release.
Her first album was called '19', which was released when she was 19 years old. Her second album was called '21', released when she was 21 years old. Her third album was named '25', released when she was 25 years old.