Answer:
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
I am wood that is neither hard straight or crooked
I am an odd number. Take away one letter and I become even. What number am I?
I am milky white and scares people.
I belong to everyone. Sometimes make you happy sometimes make you sad. I will never end until the day you do.
Give it food and it will live, give it water and it will die.