Answer:
I tremble at each breath of air, and yet can heaviest burdens bear. What am I?
Who is your mother's only sister's son's brother's aunt's daughter's sister's father?
You may enter, but you may not come in. I have space, but no room, I have keys, but open no lock. What am I?
I am heavy forward but backward I'm not.
What has an eye but cannot see?
What never gets any wetter no matter how hard it rains?