EVERYDAY SCIENCE

Detailed explanation-1: -Generally, wealthier countries have a higher average life expectancy than poorer countries [2, 3, 4], which can be argued to be achieved through higher standards of living, more effective health systems, and more resources invested in determinants of health (e.g. sanitation, housing, education) [5].

Detailed explanation-2: -The increased economic development, higher living standard, and improved health remain as relevant factors for rise of life expectancy and prolongation in longevity. These findings are valid and relevant in our research study for all five countries.

Detailed explanation-3: -A developed country is likely to have a lower population growth rate due to a lower birth rate from a low infant mortality rate.-High population growth puts pressure on resources such as healthcare, education, etc.

Detailed explanation-4: -Males born in the Lesotho have the lowest life expectancy of the world in 2022. Similarly low is the life expectancy for females born in this country. The average woman lives only 56 years.