Which of the following is a component of induced growth of population?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Migration
Option (1) Crude birth rate — Incorrect. It is the number of live births in a year per thousand people. Births add to the population from within, so this is a part of natural growth.
Option (2) Migration — Correct. Population growth has two components, natural and induced. The induced component is explained by the volume of inward and outward movement of people, that is, by migration: people coming in add to the population and people leaving reduce it.
Option (3) Crude death rate — Incorrect. It is the number of deaths in a year per thousand people. Deaths reduce the population from within, so this too is a part of natural growth.
Option (4) Sex ratio — Incorrect. It is the number of females per thousand males. It describes the make-up (composition) of a population; it is not a source of growth at all.
NCERT (2025-26): “Growth of Population … Growth of population is the change in the number of people living in a particular area between two points of time. Its rate is expressed in percentage. Population growth has two components namely; natural and induced. While the natural growth is analysed by assessing the crude birth and death rates, the induced components are explained by the volume of inward and outward movement of people in any given area.…” |