South Asia is a really difficult place to try and centralize the countries. A big problem are the large populations in the countries, with the likes of India, Pakistan, and Bangladesh all being in one of the most populated countries in the world, so centralizing them would mean that hundreds of millions of people will either live on the verge of existence (even worse than it is now), or will be moving towards the city where the centralization will be taking place, and there's no such place that can function properly if that amount of people flood in it. Another problem is that there's multiple cities that are very big, with millions of people living in them, and if centralization takes place, they will start to decline in every aspect, and that will cause huge problems of all sorts on national level.
Well dew point can never be greater than the air temperature. They may be equal which is called saturated air. The closer they may be, the greater the chance of precipitation.
Answer: D
The arrival of the Europeans drastically changed the lives of the Natives due to the fact that the Europeans were coming to the Americas to modernize and spread European culture there. The Native Americans had been there for many years before and they did not believe in modernizing the way they lived. They had been the same for many years.
Earth is at perihelion when it is closest to the Sun, sometime after the Dcember Solstice.