Red Rocket Readers: Fluency Level 2 Non-Fiction Set C: Hibernation (Reading Level 17/F&P Level J), 1st edition

Sleep is a part of our lives. Why do we need sleep? What happens if we don't get enough sleep? Do animals need sleep? Some animals like a leopard need a lot of sleep. Why is that? Hibernation is a very long sleep. Do you know any animals that hibernate? Why do animals hibernate?