Factors Affecting Population Distribution

Correct answer: A. Jobs may create initial attraction but social infrastructure is necessary for long-term family settlement

Explanation: Industrial employment can attract young workers quickly, especially when a new city offers wages and career opportunities. However, workers may not remain permanently or bring their families if schools, clinics, childcare, safe transport, housing, and elder-care services are weak. A city needs social infrastructure to support different age groups and everyday family life. Without it, early migration may slow, family settlement may be delayed, and some workers may move elsewhere despite available jobs.

Option A is correct because it links initial economic attraction with long-term social requirements. Option B denies an important condition, C wrongly reduces population growth to births alone, and D ignores the needs of major population groups. The case shows that employment can start urban growth, but inclusive services help make it stable.

Correct answer: A. Daytime population and resident population can differ greatly

Explanation: A city center may have a large daytime population because workers, shoppers, students, and visitors enter it, while its resident population remains much smaller. If housing is costly, limited, or displaced by offices and commercial buildings, many people live in suburbs and return there after work. Daytime counts and nighttime resident counts will therefore measure different groups.

Option A is correct because the two populations can differ greatly. High commercial activity does not mean everyone lives in the center, so B is false. Population does not grow only through births; migration and movement also matter, making C false. Suburbs are connected to the center through commuting and housing functions, so D is also false.

Correct answer: B. New human influences altered the earlier physical relationship

Explanation: Climate and soil are important physical factors, especially where most people depend on agriculture. However, population distribution is also shaped by human and economic forces. Highways reduce travel time and improve access, while industries create jobs, markets, services, and reasons for people to settle nearby. These changes can make a previously less attractive place grow even when its climate and soil have not changed.

Option B is therefore the most appropriate. The new human influences changed the relationship that the older model had captured. Climate and soil were not necessarily unimportant; they were simply no longer sufficient for prediction. Option C is scientifically and logically wrong because a highway does not eliminate soil. Option D is exaggerated, since industry does not completely transform climate in the stated situation.

Correct answer: C. Population distribution depends on the balance among physical, economic, and political factors

Explanation: Population distribution is shaped by several groups of factors, not by one factor alone. Fertile soil, water, transport, and jobs make a region attractive, but long-term political instability and insecurity can discourage families, investors, and public institutions. People may fear violence, uncertain property rights, disrupted services, or an unstable future, so they may avoid permanent settlement despite physical and economic advantages. The final pattern reflects the balance among physical, economic, and political conditions. Therefore option C is correct.

The word “always” makes option A unreasonable, because security risks can outweigh other benefits in particular situations. Low population does not prove that jobs are absent, so B is also invalid. Political conditions clearly influence migration, investment, and settlement decisions, contrary to D. A scientific conclusion must consider interacting factors and their relative strength rather than assuming that one favourable resource guarantees dense population.