Question

define age structure,death rate and birth rate

Answer 1

Age structure is defined as the no of people in different age groups in a country. Age structure shows the development of a country. Death rate is defined as the no of death for 1000. Birth rate is defined as the no of birth per 1000

Answer 2

age structure;-age structure of a population is distribution  of people among various ages
birth rate:-number of live births per 1,000 of a population in a year.
death rate;-number of deaths per 1,000 of a population in a year.