Answer:
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
I am what remains when nothing is left.What am I?
I am a fire's best friend. When fat, my body fills with wind. When pushed to thin, through my nose I blow. Then you can watch the embers glow.
What has 13 hearts but none beat?
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?
The warmer I am the fresher I am.