A.
contracts to move substances through the body
D.
breaks down food to acquire nutrients
Honestly I’d just bring some books and a solar powered radio so I won’t get bored
Static electricity is the answer
They saw how smoking effected the body since smoking was pushed as something good for a long time, a lot of people started smoking and after a few years doctors finally saw a difference between a smokers body and a non smokers body
A complex chemistry is most related to maintaining a stable internal environment.
