If the population of a country is to __1___, the average birth rate needs to be about two babies per couple. That is, every pair of parents have two children to __2___them in the country’s population when they die. If the __3___drops below 2, the population eventually begins to fall. ___4__all countries in Europe have a birth rate below 2, and this means that one day, they could start ___5__. For a developing country, the typicalpopulation pyramid would look like this. But if you compare this with typical pyramid of a developed country, in this case, the United Kingdom, it doesn’t have a true ___6__. The narrow bound across the base shows a __7___birth rate. And if the pyramid is rectangular, then it shows an __8___. In the the baby boom years, we had a large birth rate. And as those children have got older, but yet had less children themselves, you can __9___in the population pyramid. This is today, and as that section of the population gets older, we have less younger people to support them, the whole structure __10___: too many older people, not enough younger people.