Which of the following represents a demographic transition?
a. A ...

Question

Which of the following represents a demographic transition?
a. A population switches from exponential to logistic growth.
b. A population reaches a fertility rate of zero.
c. There are equal numbers of individuals in all age-groups.
d. A population switches from high birth and death rates to low birth and death rates.

Accepted Answer

Welcome back everyone. Let's look at our next question. It says, during which stage of the demographic transition does the population grow rapidly? Well, let's recall what are five stages of the demographic transition are just put up a quick summary and we're looking for the stage at which population grows rapidly. So we've got Stage One is high birth and death rates which leads to slow or stable population growth. And then stage two is the birth rate is high, but the death rate drops and this leads to faster population growth. So we have rapid population growth here in stage two and we can just double check uh Stage three, the birth rate starts to fall. Population growth slows. So that's not rapid population growth. Stage four the same low and birth and death rates leading to zero population growth and choice Stage five little change in population growth. So Stage two is definitely what we're looking for fast rapid population growth due to a high birth rate, but a dropping death rate. So that's Choice B here. And we see that change due to increases in better food supply, improvements in sanitation, these things that reduce disease and increased life expectancy. So Population grows rapidly in choice B. Stage two of the demographic transition hope to see in the next video

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