Perhaps the most famous invention that changed the countryside during the industrial revolution was the cotton gin. the cotton gin allowed allowed for seeds to be separated from cotton fibers, a process that was extremely laborious when done by hand.
i’m not sure if this is what you wanted but hope this helps!!
        
             
        
        
        
The United States wanted/got the Samoan Islands because of its strategic value as a naval base.
The base, based in the capital of Pago Pago, was an important refueling point and a jumping off point for naval exercises in the Southern Pacific Ocean. 
Today, the island is under the control of the US Department of the Interior. They are represented in Congress by a nonvoting delegate. 
 
        
             
        
        
        
Social and economic benefits?
        
                    
             
        
        
        
Answer: Evaporation
Explanation: liquid water absorbs the energy causing it to evaporate, and form water vapor