Question

How did cultural diffusion most likely affect the development of early civilizations?

Answer 1

interacting groups shared skills and ideas that improved farming practices 

Answer 2

Cultural diffusion refers to the spread of cultural belief and social activities from one cultural group to another. Cultural diffusion is always enhanced by communication, transportation and advances in technology nowadays.
In the early days, cultural diffusion helped and support the development of early civilization by expanding the social circle of the early people. Also, interacting groups shared ideas and skills that improved farming practice.