Answer:
What can you catch but not throw?
I am a protector. I sit on a bridge. One person can see right through me while others wonder what I hide.
I have a little house in which I live all alone. My house has no doors or windows and if I want to go out I must break through the wall.
I was was before was was was.
I'm found on Windows yet I am just a decoration. What am I?
What never gets any wetter no matter how hard it rains?