Final answer:
After Digory gives his mother the magical apple, he plants the core, which grows into a protective tree. His mother recovers from her illness as a result of eating the apple.
Step-by-step explanation:
In The Magician's Nephew, after Digory gives his mother the apple that he hopes will cure her illness, he follows Aslan's instructions and plants the apple core in the backyard. From the core, a tree rapidly grows. This tree is special, as it is connected to the magical land of Narnia and offers protection to England. As for Digory's mother, after eating the apple, she begins to recover from her illness, much to the joy and relief of Digory