Answer:
What word is a plural, but when you add an "S" to the end, it becomes singular?
At night I come without being fetched. By day I am lost without being stolen.
What is put on a table, cut, but never eaten?
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 can bring back the dead. Make us cry, make us laugh, make us young. Born in an instant yet lasts a life time?
When is it bad luck to see a black cat?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?