I am having a hard time trying to figure which two I think it would...

I am having a hard time trying to figure which two I think it would be most important

 

Can someone break it down to me which two they think is important and why. It has to be organized paragraph of at least 100 words:
 

Option 1:  Of all the developments, inventions, and geographical factors that facilitated humankind's transition from Paleolithic to Neolithic and finally to urbanization, which two do you think were the most important and why?

Option 2:   What do you think are the most important differences between the primary civilizations in Mesopotamia, Egypt, and East Asia?