Explanation:

- The concept of "pre-industrial society" refers to societies that existed before the advent of industrialization, typically characterized by agrarian economies and traditional social structures.

- Saint Simon was an early French sociologist, known for his ideas on industrial society but he did not propose the concept of "pre-industrial society" specifically.

- Kingsley Davis was an American sociologist and demographer, famous for his work on population studies, not notably for the concept of "pre-industrial society."

- Sjoberg (Gideon Sjoberg) is best known for his work "The Preindustrial City: Past and Present," where he explicitly defines and analyzes "pre-industrial society" in contrast to industrial and post-industrial societies. (Correct Answer)

- Robert Park is known for his work in urban sociology and the Chicago School, but not specifically for originating the concept of "pre-industrial society."