The first and the last question are the most relevant to the graph it’s self. The first question talks about the numbers dropping which would help clarify. The last one would help clarify what is producing these numbers. The second and fourth one are irrelevant to the graph. The third would also not be correct just because we don’t have enough information. I hope that helps!
It is also called the real density and is a measured by the total number of people divided by the total land area.
While the population density is the measurement of the population per unit of area or unit volume and is frequently used to a living organism and is a key variable to measure of the population characteristics and pattern.
