Which term defines the average number of people living within a square mile? a birthrate b population density c population distribution d doubling time

Hello! The answer to this question is definitely not birthdate or time doubling, so A and D are eliminated. In maps, people living within a square mile usually shows population density, and really not population distribution. The answer is B: Population density.

Answer glacier terminus;

I'm going to say it's 5-6 million