This aphorism is about not exceeding your limits. If your head is made out of wax, then it will melt if you go out in the sun. Similarly, if you have a big exam, you shouldn't go party the night before, or any similar comparison that you can think of.
The author believes that year round school causes time to be wasted.
Answer:
I know its hard for her, but she shouldn't smoke it's hard for her help, and she could try getting a job instead of smoking but she did so i think she is lazy?
Explanation: