Why do so many groups of people established civilizations in mesopotamia

What would be the most relevant question to ask to find out why tutankhamen died? what was tutankhamen’s age when he died? was a doctor with tutankhamen at his death? why was tutankhamen mummified after his death? did tutankhamen’s body have evidence of disease?

Which powers best complete this graphic?

What were two likely reasons that clan chiefs opposed buddhism when it was introduced in japan?