Global Growth And Distribution

Rationale: Asia holds more than 55-60% of the global population, driven largely by demographic giants such as China and India.

Rationale: Physiological density measures population pressure by dividing total inhabitants by arable (farmable) land area.

Rationale: Warren S. Thompson formulated the initial stages of demographic transition in 1929, later refined by other demographers.

Rationale: Stage 1 represents pre-industrial societies characterized by high birth rates and high death rates due to plagues, famine, and poor medical care.

Rationale: Carrying capacity refers to the maximum load and population threshold that an ecosystem can support without environmental degradation.

Rationale: Dependency ratio evaluates the economic burden borne by the working-age population (15-64) relative to youth and elderly dependents.

Rationale: The four primary population clusters are East Asia, South Asia, Europe, and Northeastern North America. Eastern South America is a secondary cluster.

Rationale: Malthus asserted that population multiplies geometrically (exponentially), whereas food supply increases arithmetically.

Rationale: Agricultural density measures the ratio of farmers to arable land, indicating agricultural efficiency and mechanization levels.

Rationale: ZPG occurs when the combination of births and deaths equals zero growth, typically when total fertility rate reaches replacement level (approx 2.1).

Rationale: Bihar consistently records the highest population density among Indian states.

Rationale: Demographic momentum happens when a large proportion of women enter childbearing years, causing population growth to continue even after fertility rates drop.

Rationale: Overpopulation is a resource-to-population ratio issue, occurring when population exceeds the carrying capacity supported by local resources and technology.

Rationale: Edwin Cannan formalized the economic theory of optimum population in his writings on wealth and population.

Rationale: A wide base reflects high birth rates and high mortality among older cohorts, typical of developing nations in early demographic stages.

Rationale: Extreme cold, frozen soils (permafrost), and short growing seasons severely limit agriculture and habitation in high latitudes.

Rationale: Ecumene comes from Greek meaning 'the inhabited world'.

Rationale: Stage 2 features industrialization advances, better sanitation, and food security that lower death rates while birth rates stay high, creating rapid population growth.