Answer:
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
What turns everything around but does not move?
I bind it and it walks. I loose it and it stops.
There are several different kinds, but the one you pick doesn't do its job. What is it?
It regulates our daily movements, but it feels no interest in our lives. It directs us when to come and go, but does not care if we pay attention. What is it?
What is so fragile that saying its name breaks it?