Answer:
I look at you, you look at me, I raise my right, you raise your left
What has many keys but cannot open a single lock or door?
What goes up but never goes down?
Without this, H2O would just be 2O
I'm a ring of sliced onion dipped in batter and then deep fried.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.