Answer:
2; 1; 3; 4;
Step-by-step explanation:
Broken down in steps:
- Before Sedentary agriculture develops, people hunt and gather food (2), living as moving entities.
- As soon as sedentary agriculture develops (1),
- people will start settling in small settlements (3).
- As soon as agriculture gives enough surplus (meaning product revenue) to make sure people don't have to work on agriculture to be fed, but can specialize in other professions. Therefore they can take functions in defense, trade, administration or other professions, and cities can develop (4)