Linda is writing a science-fiction story. In the story, Earth no longer experiences day and night. To return Earth to normal, which action should the heroine of the story take

Day and night as a result of the Earth's rotation around the sun, the fact that earth isn't experiencing day or night is because the Earth has deviated from its normal axis of rotation, so for earth to return to normal, the heroine should get Earth to start spinning around its axis again.