The flooding of river valleys created good farmland
I would say B because a surplus of food means that there is a lot of food to go around, meaning that people wouldn't have to worry about finding food all the time. So, they could go specialize in other jobs and skills, leading away from a food-centered civilization
Explanation:
yes, it can happen in the future as long as the prediction is true
What will happen to the countries that do not industrialize is that their economy will fall behind the rest of thw world's economy.
Hope this helps you!