What changes usually result when a country develops and provides free healthcare and good living conditions? What causes the birth rate to fall in a country? The United Nations (UN) predicts that the population in low-income countries will increase. What is likely to be a cause of this? The diagrams show birth rate (BR) and death rate (DR) in three countries, X, Y and Z, in two years, 1 and 2. There was no migration. Where was there a rise in population in year 1 and a fall in population in year 2? The diagrams show birth rate (BR) and death rate (DR) in three countries, X, Y, and Z, in two years, 1 and 2. Where was there a rise in population in year 1 and a fall in population in year 2? The birth rate in a country is higher than the death rate. What might prevent the country's population from rising? What is the effect on an economy of net emigration of people aged 20–40? The table shows information about four countries, A–D. Which country is most likely to have a falling population? What is likely to cause an immediate decrease in the size of the labor force? In country Z there has been a decrease in the birth rate. In the short run, which variable will be affected? A town has a population of 20,000. The birth rate is 25 per thousand and the death rate is 15 per thousand. The number of people moving in and out of the town exactly balances. What will the population be at the end of one year?