Answer:
With sharp edged wit and pointed poise. It can settle disputes without making a noise.
What has a foot but no leg?
What is it that you ought to keep after you have given it to someone else?
What is taken before you can get it?
I'm a green veggie that looks like a tiny tree.
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.