Answer:
When will water stop running down hill?
Every country has one, though we are not the same. Waving to our citizens, throughout the wind and rain. What is it?
It keeps you on the ground and stops things from floating around. What is it?
I call the trees my home, yet I never go inside, and if I ever fall off the tree I will be surely be dead.
It weighs next to nothing but no one can hold it for long. What is it?
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.