Sheri has no trouble falling asleep, but she has difficulty remaining asleep. sheri is suffering from

the organisms are not adapted to live in some communities or habitats.

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.