Answer:
What has a single eye but cannot see?
a young man was 45 age in 1995 and 40 in 2000 how is it possible
This thing all things devours: Birds, beasts, trees, flowers; Gnaws iron, bites steel; Grinds hard stones to meal; Slays king, ruins town, And beats high mountains down.
What is weightless but takes two people to hold it?
What is so fragile that saying its name breaks it?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.