Question

refers to the average number of people that live within a specific unit in an area/region.
a population
b population growth
c population density
d population distribution
births, deaths, immigration, and emigration can all affect the population
a distribution
b growth rate
c death rate
d mortality

Explanation:

• For the first question:
• Population density is calculated as the number of people per unit area (e.g., per square kilometer).
• Population (A) is just the total number of people.
• Population growth (B) is about the increase in the number of people over time.
• Population distribution (D) is about how people are spread out in an area (not the average number per unit).
• For the second question:
• Births increase the population, deaths decrease it, immigration adds to it (people coming in), and emigration subtracts from it (people leaving). All these factors together affect the population growth rate.
• Population distribution (A) is about spatial spread, not affected by these factors in the sense of rate.
• Death rate (C) is only one of the factors (related to deaths).
• Mortality (D) is similar to death rate (about the number of deaths).

Answer:

C. Population density
B. growth rate