Which grographic feature was common to the development of civilizations in ancient Egypt china India and mesopotamia?

A common geographic feature that facilitated the development of civilizations in ancient Egypt, China, India, and Mesopotamia was the presence of fertile river valleys. These regions, including the Nile, Yellow River, Indus River, and Tigris-Euphrates, provided vital water resources, fertile soil, and a means of transportation, which supported agriculture and trade. The abundance of resources allowed these early civilizations to thrive, leading to advancements in culture, technology, and governance.