What are the major achievements of the middle stage of human society describe any three of them in brief ​

Chen's research team randomly assigned some newborns and their mothers either to a breastfeeding promotion group (where breastfeeding was encouraged, but not required) or to a normal pediatric care group (where breastfeeding was neither encouraged nor discouraged). which research method did they use?

In the modern world, many countries with kings or queens have evolved into constitutional democracies. in these countries, monarchs are mostly

The judicial system of courts derives its powers from what article of the constitution