The best answer to fill in the blank would be ''Bystander'' because as that role you can go tell any adult or higher authority to stop the fighting so you don't try to be a hero and get yourself hurt as well.
You should talk with her about it
hope this helps :)
In this situation you should report what you have seen, get an adult to deal with the problem. You would not want to interfere yourself, just because it could be hazardous.
As for the partner question, just find anyone else to answer and write what they say
Answer:
b. It keeps alveoli from collapsing with breaths.
Explanation:
Surfactants are highly surface active agents which are formed from a protein and lipid complex. It comprises of a hydrophobic and hydrophilic portion and its sole purpose is to control the tension at the air-liquid interface and thereby lower the surface tension. Surfactants are produced by the type II aveolar pneumocytes in the lungs.
Surfactants are needed in order to aid breathing and prevent straining oneself, it also prevents the lungs from collapsing during breathing, a term known as atelectasis.
D) all of the above
All of these are barriers to physical activity
