Population density is a measurement of population per unit area, or exceptionally unit volume; it is a quantity of type number density. It is frequently applied to living organisms, most of the time to humans. It is a key geographical term. Hope this answered your question
I know it might be too late, but I believe the answer is B) US research and design with mostly Asian production.
<span>the answer to this question is refraction</span>
The answer is diffration hope this helped!
