1) Gravity
2) Wind
3) Glaciers
4) Surface water
5) Water
        
                    
             
        
        
        
Their placement because if they're in the less economically developed part then they would have a greater effect but if they're in the more economically developed part better shops are accessible.
        
             
        
        
        
Under the ocean is wet and in continents its dry
        
                    
             
        
        
        
They can occur anywhere between the Earth's surface; about 700 kilometers<span> below the surface.</span>