Processes of Population Change

Direct answer: Option B, two lakh, is correct. First calculate natural increase by subtracting deaths from births: 4 lakh − 2.5 lakh = 1.5 lakh. Then include net migration, because total population growth includes natural increase plus net migration: 1.5 lakh + 0.5 lakh = 2 lakh. Option B gives the correct total. Option A ignores part of the calculation and is too small. Option C is the death figure, not total growth. Option D is only the number of births and fails to subtract deaths or add migration correctly. Memory cue: total growth = (births − deaths) + net migration; keep all quantities in the same unit.

Direct answer: C. Begin with natural increase: births minus deaths. In this case, births exceed deaths, so natural increase is positive. Next consider net migration: people entering minus people leaving. If many more people leave than enter, net migration is negative. Total population change depends on both components: natural increase plus net migration. A is incomplete because births alone ignore deaths and migration. B is incomplete because deaths alone cannot show total change. C is correct because it combines natural increase with migration. D is wrong because land area does not calculate population change. Memory cue: total change = births − deaths + immigration − emigration.

Direct answer: Option A is correct. Natural increase is calculated from births minus deaths. If deaths are greater than births, natural increase becomes negative. However, total population also changes because of migration. When more people enter the area than leave it, immigration can be large enough to compensate for the natural decrease. The total population can therefore rise even though births are fewer than deaths. Option A is correct because high immigration adds people to the area. Option B is wrong because emigration removes people and would usually make total population smaller, other things being equal. Option C would make natural decrease stronger, not cause total growth. Option D cannot explain an increase: zero births with deaths occurring would produce a natural decrease, unless migration more than compensated, and the option itself does not identify that cause. Memory cue: natural change = births minus deaths; total change also includes migration.

Direct answer: Option A, immigration, is correct. Employment opportunities attract people who are looking for work and better income. When people move into a particular area from another place, the movement is called immigration from the viewpoint of the receiving area. Better jobs, wages, education, and services are commonly described as pull factors because they attract people. Option A is correct because new jobs can encourage people to enter the area. Option B, emigration, means moving out of an area; it may occur from places with fewer opportunities, but it is not the movement into the job-rich area asked about here. Option C, seasonal migration, is defined by temporary or periodic movement and is not necessarily caused by the stated change. Option D, forced migration, occurs when people are compelled to move by serious circumstances, not simply because jobs are available. Memory cue: immigration means in; emigration means out.

Direct answer: Option B, emigration, is correct. Lack of employment is a push factor. It may encourage people to leave their present area and search for work elsewhere. When people move out of an area, the movement is called emigration from that area’s viewpoint. Option B is correct because unemployment can push residents to other places. Option A, immigration, means entering an area; the question focuses on leaving the area with few jobs, although the same people could become immigrants in the destination area. Option C, births, are biological events and are not a type of migration. Option D, natural increase, means births minus deaths and is also not migration. A useful distinction is viewpoint: a person leaving one region is an emigrant from the origin, but an immigrant in the destination. Memory cue: push factors push people out; pull factors draw people in.

The direct answer is A: total growth may increase. Population change has more than one component. Natural increase is the difference between births and deaths, while migration means people entering or leaving an area. If an industrial project creates jobs, workers and their families may move into that area. This inward movement is immigration or in-migration, and it adds people to the population. Thus, even when births exceed deaths by only a small amount, the arrival of migrants can make total population growth larger. Option A is correct because it recognises the effect of migration. Option B is wrong because total growth will not always decrease; incoming people may increase it. Option C is wrong because migration directly changes the number of people living in an area. Option D is wrong because migration does not make the birth rate zero. Memory cue: total population change depends on natural increase plus net migration.

The direct answer is A. Natural decrease occurs when deaths are greater than births, so the population loses people through natural change. However, total population also depends on migration. If the number of people moving into the area is greater than the natural decrease, the gain from in-migration can more than compensate for the natural loss. For example, if natural decrease is 1,000 but 1,500 people migrate into the area, the total population still rises by 500. B is wrong because out-migration removes additional people. C cannot produce an increase because it adds no people and births are zero. D is wrong because high deaths and out-migration both reduce population. Memory cue: total change = natural change + migration change.

The direct answer is A. In-migration means people are entering the city from elsewhere. These additional residents need homes, drinking water, sanitation and other urban services. If planning and construction do not keep pace with the incoming population, demand will exceed available supply, creating pressure on housing and water. This may appear as overcrowding, higher competition for homes or inadequate access to water, but the question asks for the main general problem. B is wrong because in-migration adds people rather than automatically reducing the population. C is wrong because slow planning does not cancel the demographic effect of migration. D is plainly wrong because migration cannot make the city’s geographical area zero. The key is to connect population movement with service demand. Memory cue: more people arriving means more demand immediately.

Correct answer: A. A population can remain the same in total while its age composition changes. The working-age group generally supplies labour, income and tax support, whereas children and many older people depend more on earners and public services. If the working-age group becomes smaller, there may be fewer workers supporting a relatively larger dependent population. Planners must therefore examine employment, pensions, healthcare, education and social-support needs, not just the total number of people. A is correct because it identifies the changing worker-to-dependent balance. B is wrong because river length is a physical geographical feature and does not describe the age structure. C is unrelated to population planning. D is not a meaningful demographic measure. Memory cue: total population tells “how many”; age structure helps explain “who needs support.”

Correct answer: A. Natural increase is the difference between births and deaths. It does not include people who move into or out of a city. A city may therefore have few births above deaths and still grow because workers, students or families migrate into it. More in-migration can increase competition for houses and raise rents, especially when housing construction does not keep pace with demand. A is correct because it connects migration with the pressure on urban housing. B is incomplete: the death rate alone cannot explain rising rents and ignores migration and births. C may affect settlement in some situations but is not the most direct demographic explanation here. D can influence land use, but it does not directly measure urban population movement or housing demand. Memory cue: natural increase is births minus deaths; migration is movement across a place boundary.

Correct answer: A. Net migration is calculated by subtracting out-migration from in-migration. It shows the balance of movement and its effect on population size. Total, or gross, migration counts the movements in both directions together. For example, 1,000 people may enter and 1,000 may leave: net migration is zero, but total movement is 2,000. Such movement can still change the age, skills, occupations, languages and service needs of a place. A is correct because a stable net number does not mean that no people moved. B is wrong because net and total migration use different calculations. C is false because migration changes population size or composition. D is unrelated. Memory cue: net means the balance; total means all movement counted together.

Answer: A, when out-migration is very high. Population change depends on both natural change and migration. Natural change is calculated as births minus deaths. Total population change also includes people entering and leaving the region: population change = births − deaths + in-migration − out-migration. Thus, if births exceed deaths by 1,000 but 2,000 more people leave than enter, the region loses 1,000 people overall. Option A is correct because a large outflow can overcome natural increase. B is not necessarily correct: higher literacy may influence population patterns, but it does not automatically make population fall. C concerns a river, not population accounting. D is only a map-design change and cannot alter the number of residents. Memory cue: natural increase tells what happens through births and deaths; migration tells who moves in or out.

Answer: A is correct. Internal migration means people move from one part of the same country to another. When people enter a state, in-migration adds to that state's population. When people leave it, out-migration removes people from the state's population. Therefore, migration can change the population growth of a state even if its birth and death rates do not change. Population change is commonly understood through births, deaths and migration. A is correct because it includes both directions of movement. B is wrong because migration directly changes the number of people in a region. C is wrong because migration is not death; it is movement from one place to another. D is wrong because migration does not automatically change the birth rate to zero. Memory cue: people coming in add, and people going out subtract.

Correct answer: A. Migration means the movement of people from one place to another. When a region offers jobs, better wages, education or business opportunities, people from other regions may move into it. This is called in-migration. These newcomers increase the region’s population even if the local birth rate has not changed. Population change can be understood through births, deaths and migration. B is wrong because economic opportunities do not stop all births. C is wrong because employment opportunities may improve living conditions, but they cannot guarantee that the death rate will always be zero. D is wrong because natural increase still means births minus deaths; migration is a separate component of population change. The word “possible” is important: opportunities can attract migrants, but the result is not automatic in every case. Memory cue: jobs attract people, so in-migration can raise regional population.

Direct answer: A is correct. The relationship works in both directions. Step one: places with factories, offices, markets, transport, or other economic opportunities often attract migrants because people move in search of work and better livelihoods. Step two: when the population grows, the number of working-age people and consumers may increase. This can enlarge the labour market, support production, and create demand for goods and services. The result depends on education, skills, investment, and the availability of suitable jobs; growth does not automatically guarantee employment. B is wrong because opportunities and population movement are connected. C is wrong because the word “always” makes the claim too absolute: a larger population can also create workers and consumers. D is wrong because migration means movement of people from one place to another, whereas death rate concerns deaths in a population. Memory cue: opportunities pull people; people can supply labour and demand.

Direct answer: B, when in-migration is greater than out-migration. Natural increase means births minus deaths. If births and deaths are equal, natural increase is zero. However, total population also changes through migration. People entering an area are added, while people leaving are subtracted. Thus, if 500 people enter and 300 leave, net migration is +200, so the population rises even though births equal deaths. A is wrong because fewer births than deaths create negative natural increase. C would reduce the population through migration. D is not a demographic condition and gives no valid conclusion. Remember: actual population growth = natural increase + net migration; net migration = in-migration − out-migration. A positive migration balance can therefore produce population growth.

Direct answer: A, 300. Actual growth combines natural increase and net migration. First calculate natural increase: births − deaths = 1,500 − 900 = 600. Next calculate net migration: in-migration − out-migration = 400 − 700 = −300. The negative sign means 300 more people left than entered. Therefore, actual growth = 600 + (−300) = 300. The same result comes from the complete formula: actual growth = births − deaths + in-migration − out-migration = 1,500 − 900 + 400 − 700 = 300. B is only the natural increase and ignores migration. C adds figures incorrectly and does not subtract deaths and out-migration properly. D is not a growth calculation at all; it treats several flows as if all increased the population. Memory cue: births and arrivals add; deaths and departures subtract.

Direct answer: A, in-migration. Natural increase is births minus deaths, so a low natural increase means births and deaths are contributing little net growth. A metropolis can nevertheless attract people from villages, smaller towns, or other regions. These newcomers increase the population needing homes, transport, water, and other services. Therefore, rapidly rising housing demand should prompt an examination of in-migration and, where relevant, the number of households and temporary residents. B is incomplete because death rate alone cannot explain the added housing demand. C and D are physical-environment factors, not the demographic component most directly indicated by the situation. Out-migration would generally reduce local population pressure, although other housing factors can also matter. Memory cue: when a city grows faster than its natural increase suggests, look at movement into the city.

The correct answer is A: service pressure and a greater possibility of informal settlements. In-migration means people enter a place from another area. These newcomers increase the demand for housing, water, sanitation, transport, schools, health care and employment. If services and infrastructure expand more slowly than the population, existing facilities become overcrowded and many people may not find affordable formal housing. Some may therefore live in unplanned or informal settlements. Option B is wrong because more people normally increase, not end, the demand for services. Option C is wrong because in-migration adds population unless other processes completely offset it. Option D is wrong because a growing population does not make a city uninhabited. Memory cue: when population growth is faster than service capacity, think “pressure, shortage and informality.”

The correct answer is A: rural-to-urban migration. A push factor is a condition that encourages people to leave their present place; increasing pressure on rural land can reduce access to farms, income and livelihood opportunities. A pull factor is an attractive condition at another place; jobs in cities can attract workers. When a rural push factor and an urban pull factor operate together, movement from villages or rural areas to towns and cities may increase. Option B is wrong because glacier expansion is a physical geographical process, not a population response to jobs. Option C concerns the wearing away of coasts by marine action. Option D refers to volcanic activity. Memory cue: “push people out, pull people in”—rural land pressure pushes, while urban employment pulls.

The correct answer is A: deaths and out-migration may be very high. Population change depends on more than births. A simple demographic balance is: population change = births − deaths + in-migration − out-migration. A high birth rate adds people, but a high number of deaths removes people, and out-migration takes people to other areas. If these reductions are large enough, they can offset many births, producing low growth or even a decline. B would add people and normally raise growth. C would remove fewer people and generally support faster growth. D removes one possible loss and therefore does not explain low growth by itself. Memory cue: never judge population change from births alone; check births, deaths and both directions of migration.

Direct answer: A, when mainly young workers move out. Age structure means the proportion of people in different age groups, such as children, working-age adults, and older people. Out migration removes people from the area, but its effect depends on who leaves. If young workers leave in large numbers, the remaining population may contain relatively more children and older people and fewer working-age adults. This can also reduce the local labour force and increase the dependent share. Option A is correct because it identifies the age group that is migrating. Option B is wrong because no out migration cannot directly change age structure through out migration. Option C is wrong because equal movement of all age groups is less likely to change their proportions greatly. Option D is wrong because it describes no migration; equal births and deaths alone do not represent an out-migration effect. Memory cue: migration changes population composition most when migrants are concentrated in one age group.

Direct answer: A, 1,100. First calculate natural increase: births minus deaths = 5,000 − 3,200 = 1,800. Next calculate net migration: in-migration minus out-migration = 1,400 − 2,100 = −700. The negative sign means the city lost 700 people through migration. Total population growth = natural increase + net migration = 1,800 + (−700) = 1,100. Option A is correct. Option B is only the natural increase and ignores migration. Option C results from adding figures incorrectly and does not use the net migration balance. Option D is also an incorrect combination of the four numbers. A useful check is to notice that out-migration exceeds in-migration, so migration must reduce the natural increase rather than add to it. Memory cue: births minus deaths, plus arrivals minus departures.

Direct answer: A is correct. Population change has more than one component. Natural increase is the difference between the number of births and the number of deaths during a period. Migration changes population through people entering an area and people leaving it. Therefore, to understand the total change in a place, we should study both the natural increase and the migration balance. Option A correctly describes their combined effect. B is wrong because migration does not automatically change the number of births minus deaths to zero. C is wrong because births and deaths directly define natural increase. D is wrong because area is not itself population growth; area may be used in density calculations. Memory cue: total change is linked to births, deaths, and movement of people.

Direct answer: A is correct. Net migration is calculated as in-migration minus out-migration. If 10,000 people enter and 10,000 leave, net migration is zero, but 20,000 movements have still occurred. The total population may remain nearly unchanged, yet the people entering may have different ages, occupations, education levels and service needs from those leaving. Therefore, planners must examine gross migration flows and changes in population composition, not just the net figure. A is correct because separate study of incoming and outgoing groups helps plan housing, schools, hospitals, transport, jobs and skill services. B is wrong because zero net migration does not mean zero movement. C is wrong because the area still has its resident population. D is wrong because birth rate measures births, whereas migration means movement between places. Memory cue: net means balance; it does not show the size of the two flows.