Answer:
What object has keys that open no locks, space but no room, and you can enter but not go in?
What type of house weighs the least?
What gets broken when you don't hold it?
War fought with pieces on a board.
Timid or weak people are said to not have these.
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.