<span>Ventilation.
Ventilation is used to identify the mechanical movement of gas or air into and out of the lungs. (1232)</span>
I think its A) A antigens
It draws a conclusion based on what would best explain one's observations.
Inference is the process where logical consequences evolve from premises that are assumed to be true. Knowledge backed with observations and reasoning as evidence is used to make conclusions. It is also referred to as an educated guess and is not necessarily factual.
Composition is what it's made of vs texture being what the substance feels like.
Fact check for the answer:
I just did this on USA Test Prep, and I can confirm the answer is B!!
