Multiple Choice, Multiple Answers

Read the passage and select ALL statements it supports.

Sleep is far from idle time for the brain. While we rest, the mind appears to sort through the day's experiences, deciding which memories to keep and which to discard. During deep sleep, fragile new memories are thought to be transferred from temporary storage to more permanent networks, a process that helps fix learning in place. Dreaming sleep, by contrast, may help weave new information together with older knowledge and ease emotional tension. Studies repeatedly show that people who sleep after learning a task perform better than those kept awake. Cutting sleep short, then, does not only cause tiredness; it can quietly undermine the memories we worked to form.