What is the smartest letter of the alphabet?

Question

These riddles are for the very young.
The answer to each question is a letter of the alphabet.

1. Which letter of the alphabet is wet and salty?
2. Which letter of the alphabet is a Nosey Parker?
3. Which letter of the alphabet is a little bird?
4. Which letter of the alphabet looks good on everybody?
5. Which letter of the alphabet wings, sings and stings?
6. Which letter of the alphabet keeps us waiting?
7. Which letter of the alphabet is a river?
8. Which letter of the alphabet is small and round?

9. Which letter of the alphabet speaks of possessions?

10. Which letter of the alphabet tastes good, hot or iced?