Answer:
This is a shape and a symbol that we literally cannot live without. What is it?
What has a foot but no leg?
I reach for the sky, but clutch to the ground. Sometimes I leave, but I am always around
I'm a god. I'm a planet. I measure heat.
The negative hero in each story
The sun bakes them, The hand breaks them, The foot treads on them, And the mouth tastes them. What are they?