What does life expectancy measure? the average income a population likely earns during employment
the average human development during a population’s lifetime
the average number of years that a population is likely to live
the average standard of living during a population’s lifetime

the average number of years that a population is likely to live

Explanation:

Life Expectancy is usually counted in order to find out a general idea on the standard of living in a country.

It's a measurement that can be examined to find out how the country is dealing with issues like : Medical care for it's citizens, service distribution among people with different income level, quality of their foods & water, the advancement in their medical knowledge, etc.

Typically, countries with higher GDP per capita will have higher expectancy compared to developing countries.

this headline suggests that midterm congressional   elections are at the corner and trump administration wants to activate his base by vowing to clamp down on immigrants and immigration as trump had said during his election campaign around two years ago. when a baby is born in usa, the baby becomes citizen of usa for 85 years and trump wants to end this rule of birthright citizenship to control illegal immigration and this what he said in an interview""we’re the only country in the world where a person comes in and has a baby, and the baby is essentially a citizen of the united states for 85 years, with all of those benefits,” "