Air is warmed and humidified in the nasal passages. this to
ward off infection
decrease sensitivity during breathing
prevent damage to the lungs
all of the above

The correct answer is c. prevent damage to the lungs

Explanation:

There are several ways in which our lungs can be damaged. The most common one is smoking, pollution, and lack of exercise. However, we have a body which helps us to avoid that our lungs can be more damaged and this body allows the nasal passages to have warmed and humidified air to prevent damage to the lungs.

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.