Answer:
A time when they're green. A time when they're brown. But both of these times, cause me to frown. But just in between, for a very short while. They're perfect and yellow. And cause me to smile.
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.
I have a neck but no head. I have a body but no arm. I have a bottom but no leg.
Thousands of these come together to make a digital image. What is it?
My teeth are sharp, my back is straight, to cut things up it is my fate.
Why is the letter B always cool?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?