Over the past 20 years, the human population in China has experienced great economic development. The government has imposed controls on birth rates, limiting most families to a single child, yet the population has continued to grow. These conditions in China are typical of which stage in the demographic transition model?

Stage 3 of the Demographic Transition Model

Explanation:Stage 3 of the Demographic Transition Model (DTM) , is the stage that focuses on low death rates and birth rate diminishes due to improved education systems and better economic conditions and an increased access to contraception.

In stage 3 a population stability is maintained through decreasing birth rate.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place