Question

which two factors add to the population size of a country?
a. birth rates and mortality rates
b. emigration rates and death rates
c. birth rates and immigration rates
d. emigration rates and immigration rates

Explanation:

To determine which factors add to a country's population size, we analyze each option:

• Option A: Birth rates add to population, but mortality (death) rates decrease it, so this is incorrect.
• Option B: Emigration (people leaving) and death rates both decrease population, so incorrect.
• Option C: Birth rates (new births) and immigration (people entering) both increase the population size, so this is correct.
• Option D: Emigration decreases population, while immigration increases it; they do not both add to population size.

Answer:

C. birth rates and immigration rates