Air from the outside is:

warmed, dried and cleaned by the nose and mouth
cooled, dried and cleaned by the nose and mouth
cooled, moistened and cleaned by the nose and mouth
warmed, moistened and cleaned by the nose and mouth

Correct answer is:

D. Warmed, moistened, and cleaned by the nose and mouth.

Explanation:

Nostrils hairs and they are near very next to Nose and the hairs simply filter air a scarce by catching dust shreds from it. As air moves from the outside atmosphere to the lungs. It is purified in lungs by alveoli. Where a replacement of gases germinates.

d. everyone should be treated fairly.