Answer:
Every night I'm told what to do, and each morning I do what I'm told. But I still don't escape your scold. What am I?
Use me to reward good behavior.
The warmer I am, the fresher I am. What am I?
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves every day. What am I?
I can be sweet or sour. I do not rhyme with any other word
The answer I give is yes, but what I mean is no. What was the question?