The correct answer is the following.
The correct order is:
1) Domesticate various animals.
2) Development of Agriculture.
3) Discover fertile valleys.
4) More people joined them to join communities.
5)Settle down, and over time developed agrarian societies.
The progress of the early man had many important moments. From the time the stop being nomads that followed animals to hunt, they started to settle in the valleys and next to the Rivers to take advantage of the water to drink and for irrigation purposes. That was the case of the Indus Valley Civilization or SUmeri in the Middle East. There, they learn to farm the fields and grow crops, to domesticate animals to use them as food. They discovered fertile valleys like the one between the Tigres and Euphrates Rivers in Mesopotamia, where great civilizations developed and later were joined by other people.