What am I?

I am not alive but I grow. I don't have lungs but I need air. What am i?

I live in my little house all alone. There are no windows or doors, and if I want to go out I have to break through the wall. What am I?

Before I came, the world was darker, that's true. But beware, I can also kill you. What am I?

With the rich I am blue, with the poor I am red, with the amphibian I am cold but with the dog I am hot instead, What am I?

Riddles and Answers