Temperature, precipitation, seasons. Example: U.S. North (cold winters) vs. South (mild winters, hot summers).
Landforms, water, soils. Example: U.S. West (mountains, deserts) vs. East (hills, coasts).
Dialects, food, customs, values. Example: U.S. South (hospitality, BBQ) vs. Northeast (fast-paced, diverse arts).
Industries, jobs, income. Example: Silicon Valley (tech) vs. Rust Belt (manufacturing legacy).
Age, ethnicity, growth. Example: Sun Belt (growing, diverse) vs. Great Plains (aging, declining).
These factors interact—geography shapes economy, which draws people, creating culture.