Air flows from the larynx to the trachea, then enters the
a. left and right lungs
b. left and right main bronchi
c. pharynx
d. segmental bronchi

The answer is B: left and right main bronchi.

Explanation:

The air enters the lungs through the nose and mouth, initially passing through the pharynx, from there the air passes through the epiglottis to reach the larynx (where the vocal cords meet); then continue to the trachea, which is divided into 2 tubes in its lower part, called right and left bronchial (primary bronchi). It ends up in even smaller tubes called bronchioles, as thin as a hair and finally ending, in the alveoli, where the gas exchange occurs.

answer:

this will get deleted soon so answer quickly!

answer:

it could come from a variety of sources.

explanation:

..although it was most likely developed through zoonotic transmission, where an infectious disease which usually afflicts when animals jump to humans.