Answer:
Where is the ocean deepest?
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
What do you have in December that you don't have in any other month?
What is at the end of a rainbow?
A father's child, a mother's child, yet no one's son
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?