Answer:
There are several different kinds, but the one you pick doesn't do its job. What is it?
A harvest sown and reaped on the same day in an unplowed field. Which increases without growing, remains whole though it is eaten within and without. Is useless and yet the staple of nations.
My life can be measured in hours. I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
I am a span of time you can always see through I am also the timepiece with the most pieces. What am I?
What flies without wings?
It's what light turns into in the night
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?