Overall ageing of a population can be prompted by __?
Population ageing is a shift in the distribution of a country’s population towards older ages. This is usually reflected in an increase in the population’s mean and median ages, a decline in the proportion of the population composed of children, and a rise in the proportion of the population that is elderly. It occurs when the median age of a country or region rises due to rising life expectancy (i.e. decline in mortality) and/or declining birth rates. Thus option D is correct. It is an oft-remarked feature of the more-developed world, with implications such as the increasing tax burden placed on the working age population, allied to increasing needs for specialist social, health and personal services for the growing elderly.
This question is a part of GKToday's Integrated IAS General Studies Module