What seven-letter word has hundreds of letters in it?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

What's the only room from which no one can enter or leave

What can you see in the middle of March and April that you can never see in any other month?

What time is it when an elephant sits on a fence?

Decode this picture on T-Shirt and tell what it says ?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.

The Little ant seems to be always confused. Do you know why?

How is a fly different from a mosquito?