Final answer:
The first civilizations in Asia and Africa shared the common feature of having organized governments that enabled the development of complex societies with social hierarchies, economic systems, and cultural practices.
Step-by-step explanation:
The first civilizations in Asia and Africa had several common features, most notably the development of organized governments. These early civilizations often arose along large rivers, such as the Nile in Egypt or the Yellow River in China, benefiting from fertile land which fostered the growth of agriculturally sustained settlements and a static population. The establishment of these governments allowed for a hierarchical social structure, the creation of writing and number systems, and the building of impressive monuments and structures.
Answering the student's question, option B is correct: They had organized governments. This governance led to a variety of developments including advanced economic systems, social hierarchies, complex religious beliefs, and a cultural identity. While each civilization developed its own unique characteristics, the presence of an organized government system was a common thread among them.