Answer:
What is the smallest bridge in the world?
The moon is my father. The sea is my mother. I have a million brothers. I die when I reach land.
Up on high I wave away but not a word can I say.
What relies on columns but isn't a house, and asks for help but can't speak itself?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
I have two bodies joined together as one. When standing still I run and run.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?