Final answer:
Advanced medical technology is not a reason for differences in life expectancy and infant mortality rates between low-income and high-income countries, as it is a feature of wealthier nations that aids in improving health outcomes.
Step-by-step explanation:
The question asks which of the following is not a reason for the differences in life expectancy and infant mortality rate in low-income countries as compared to high-income countries:
- Lack of access to healthcare
- Poor nutrition
- Cultural practices
- Advanced medical technology
Low-income countries often struggle with healthcare access, poor nutrition, and issues related to clean water and sanitation, all contributing to lower life expectancies and higher infant mortality rates. However, advanced medical technology is more typically a feature of high-income countries that actually helps to reduce mortality rates, making it the incorrect choice as a reason for worse health outcomes in poorer countries. Countries with low income face challenges such as infectious diseases, inadequate water and sewer systems, and a scarcity of medical personnel, all of which lead to higher rates of infant mortality and shorter life expectancies.