lette-r-iddle

Question: If all of your surrounding is X, you can't Y. X n Y have the same letters. Name X n Y.

Question: What do you call a sad bird?

Question: What can be broken but never forgotten?

Question: What tastes better than it smells?

Question: People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?

Question: What goes in the water black and comes out red?