Answer:
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.
What's a place you have left but didn't enter?
Plow and hoe, reap and sow, What soon does every farmer grow?
I am mother and father, but never birth or nurse. I'm rarely still, but I never wander.
We are all around, yet to us you are half blind. Sunlight makes us invisible, and difficult to find.
When is it bad luck to see a black cat?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?