Answer:
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
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 does a WW1 Trench, A Submarine and a Popular Phone App all have in common?
Break it and it is better, immediately set and harder to break again.
When can someone truthfully tell someone “well done” but think they did a bad job?
What is the difference between love and marriage?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?