Question

in winter breath is seen

Answer 1

You probably know that every time you breathe in, you draw oxygen into your lungs, and every time you breathe out, you expel carbon dioxide. Both of these gases are invisible, so the phenomenon of seeing your breath when it's cold outside is a little mysterious. The reason doesn't have much to do with oxygen or carbon dioxide, but with water vapor, which is in both the human body and the surrounding air.