What was one of the basic features of early civilizations?

a. monotheism
b. absence of organized governments
c. nomadic culture
d. architecture

The answer is; architecture;

Civilization can be categorized as the time when humans became highly organized societies and began to express their culture and arts in urban development. This also begins when humans begin to have domination over their environment. This is after the primitive period of the Neolithic period of hunters and gatherers. Due to plentiful food persons begin to have the time to  observe the world and transcend to create art and architecture. Some of the early civilization are observed in the Greek Empire that is renowned for its Roman architecture.

they were the direct result of some cultural difussion.