Answer:
Option: The flooding of rivers created good farmland.
Step-by-step explanation:
The early civilizations begin in the river valleys because rivers helped in thriving the civilization, by creating the land fertile by flooding. Rivers also allowed the early civilizations to engage in agriculture by growing crops like wheat, barley, and vegetables. The river valley civilizations are also known as the cradle of civilization. By establishing their kingdoms in the valleys, led them in developing the first agrarian societies.