Did you accidentally click history when you asked this question? Not to be rude, but this is a math problem. If it is statistics or something else from past times, then my appologies. I'll be on my way.
Uplifted soil lead to it being catched by the tornados and wind.
Geography has a profound effect on where civilizations settle. The earliest civilizations resided within river valleys, and used the area around them to create opportunities to benefit their growth. Mountains, rivers, and plateaus provided natural defenses, at the cost of movement and trade.
The Amazon River Basin is the world's largest rain forest.
