Which of the following best describes what alveoli are?

a. they are the smallest tubes in the respiratory system.

b. they have a small amount of surface area.

c. they are found on the end of bronchioles.

d. they are compromised of millions of cells.

A.

It's not C because they are spread in clusters throughout the lung, not D because they are really one thick cell , surface area isn't that small

the median of the data is 4.5.

idk what the options are but

these is a strong electrostatic attraction between the ions hence a lot of energy is needed to overcome this attraction

this is why the boiling points are so high