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| Pregunta | Respuesta |
| Define birth rate. | The number of live birth a year per 1000 of the population. |
| Define death rate. | The number of deaths a year per 1000 of the population. |
| What will happen to the overall population if the death rate is larger than the birth rate? | Natural decrease in the population. |
| What will happen to the overall population if the birth rate is larger than the death rate? | Natural increase in the population. |
| Give reasons for an increase in birth rates. | Better hygiene levels, more safe drinking water, better food resources, absence of disease, |
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