Answer:
The force of surface tension in the lungs is so great that without something to reduce the surface tension, the airways would collapse after exhalation, making re-inflation during inhalation much more difficult and less effective. Collapse of the lungs is called alectasis.
Explanation:
First answer: 4
Second answer: I think 2?
Third answer: 5
Fourth answer: 1
Answer:
evaporation follows condensation