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.
The tilt of the Earths axis can affect where the Suns rays hit the Earth. If the northern hemisphere tilts slightly more than the southern hemisphere, the northern hemisphere is facing the sun more often, this is known as "Summer" for people in the north, and "Winter" for people in the south. Im not sure if that answered your question, but the suns rays bounce off the Earths surface and clouds and sometimes hit each other in our atmosphere.
Answer:
The word religion means a basis, a standard to follow based around a belief system that is tempting to have become a reality. It is a picture perfect idea that can help lead someone through their life's hardships, and support them by receiving and giving prayers to live their holiest and most full life. Some religions have lasted for such lengths of time since they have a structure built around them, they've gained a following of people who are attracted to the ideas the religion offers. For example, Christianity has grown and built itself into modern societies since it has ideas that people are attracted to and want to be a reality, such as the afterlife, which rewards someone for living a holy life, giving them a forever heaven after they die. Governments can also play a power in ingraining religions into a nation, making it last for thousands of years.
Explanation:
My own words and explanation. :)