Similar physical geography such as major rivers, fertile soil, mild climates and abundant natural resources allowed humans to settle and develop civilizations which created many innovations including culture. What are these areas known as?

Correct answer is civilizations.

Explanation:

Civilization is the correct answer, because it refers to first ancient civilizations, including those that developed around rivers Nile, Euphrates, Indus, Tigris and many others. Innovations that were introduced totally changed people's perspective, including sharper division of labor, higher population density, social structures...