The demographic transition describes...

The demographic transition describes...

• A. A shift from rural to urban living
• B. The transition from high birth and death rates to lower birth and death rates as development occurs
• C. Increases in life expectancy due to medical advances
• D. The distribution of age groups in a population

Answer: (B)

The demographic transition describes how birth and death rates change as a society develops. In traditional, preindustrial populations, both birth and death rates are high, so population growth is slow and life expectancy is limited. As development proceeds, improvements in health, sanitation, nutrition, and healthcare cause death rates to fall first, leading to a period of faster population growth. Later, birth rates begin to decline due to factors like urbanization, higher education, women's empowerment, and access to family planning, and when they drop to align with the lower death rates, population growth stabilizes at a lower level. Some countries may eventually age as birth rates stay low, but the essential idea is the shift from high birth and death rates to lower birth and death rates with development. This differs from urbanization alone, which is about where people live, or from just life expectancy increasing, or from the shape of the age distribution, which are outcomes of the transition rather than the defining pattern itself.

The demographic transition describes how birth and death rates change as a society develops. In traditional, preindustrial populations, both birth and death rates are high, so population growth is slow and life expectancy is limited. As development proceeds, improvements in health, sanitation, nutrition, and healthcare cause death rates to fall first, leading to a period of faster population growth. Later, birth rates begin to decline due to factors like urbanization, higher education, women's empowerment, and access to family planning, and when they drop to align with the lower death rates, population growth stabilizes at a lower level. Some countries may eventually age as birth rates stay low, but the essential idea is the shift from high birth and death rates to lower birth and death rates with development. This differs from urbanization alone, which is about where people live, or from just life expectancy increasing, or from the shape of the age distribution, which are outcomes of the transition rather than the defining pattern itself.