Q- Define age structure, death rate and birth rate.
Answer- Age structure: The age structure of a population refers to the number of people in different age groups in that population.
Birth rate: The number of live births per thousand of population per year is called as Birth Rate of that country.
Death Rate: The ratio of deaths to the population of a particular area or during a particular period of time, it is usually calculated as the number of deaths per thousand people per year.