Why was the process of amending the Constitution made more difficult than passing an ordinary law?

The oldest known mesopotamian civilization settled in areas along river banks or sea sides surrounded by mountains and deserts which two statements explain why three geographical features led to the rise of mesopotamian civilizations

Which of the following areas was not part of roman empire? a: syria c: bridges b: forums d: aqueducts h.e.l.p asap

Why did alexander give the soldier who saved the hat band a reward? why did he then order the man's head cut off?