Answer:departmentalization
Explanation:
 
        
             
        
        
        
The answer is, "Sugarcane".
        
             
        
        
        
Answer: B. Annual river floods replaced the soil, which improved the crops.
Explanation: Annual floods enriched the soil by dragging nutrients through the water, improving and speeding the growth of crops. 
 
        
             
        
        
        
No, there isn't no electricity, sanitation, or water-supply systems because of course it is a mountain and people usually die trying to get to the tallest mountain in the world.
Hope I Helped You!!!