Answer:
Without this, eating food and Steven Spielberg's career would be very different.
Plow and hoe, reap and sow, What soon does every farmer grow?
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
It's got twists and turns, but has no curves. Twist it to fix it, turn it to ruin it. What is it?
What goes through a door but never goes in. And never comes out?
I am your mother's brother's only brother in law. Who am I?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?