Question

why it was hard for Jack to make Jo sleep even after telling the story?​

Answer 1

Answer:

Story telling to Jo had become quite fatiguing for Jack because Jo never fell asleep in naps any more; she had grown young and didn't fall asleep. Earlier when she was two or three years old, she would fall asleep listening to the story.

Answer 2

Answer:

it was hard for Jack to make Jo asleep even after telling the story because now she has grown young and didn't fall asleep