a: sleep cycle ~
b: bodies natural alarm clock
What:
"your sleep cycle is like your bodies natural alarm clock. It lets your mind and body know when to wake up and when to start feeling tired at night. Usually, this is based on whether it's dark outside or light in the morning, and how tired you're feeling."
Useful?
Writer: Stefan
LCC:
Where:
Date: Apr 12 2016 5:22 PM
# 9753 Critique Analogy