Answer:
What looks back but cannot see?
What has a head, a tail, is brown, and has no legs?
There is one word that stands the test of time and holds fast to the center of everything. Though everyone will try at least once in their life to move around this word, but in fact, unknowingly, they use it every moment of the day. Young or old, awake or in sleep, human or animal, this word stands fast. It belongs to everyone, to all living things, but no one can master it. The word is?
What covers its face with its hands, speaks no language, yet most known what it's saying?
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.
I am your mother's brother's only brother in law. Who am I?