Question

In winter season we observe fog while breathing why?

Answer 1

Cold air holds less moisture than warm air. So when the warm, humidified air comes out from your lungs and enters a colder environment, the moisture found in that breath condenses and can be seen as water vapour.
hope it will help you ..

Answer 2

In winter season we observe fog while breathing because in winter the molecular sapce of air moluce is very low so In winter season we observe fog while breathing