Answer:
I look at you, you look at me. I raise my right, you raise your left. What am I?
Before Mount Everest was discovered what was the highest mountain on Earth?
The more of me you take, the more I appear behind you. What am I?
I am lighter than air, but a hundred people cannot lift me. Careful, I am fragile. What am I?
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?
Give it food and it will live, give it water and it will die.