They left rich soil when flood waters receded. So the correct option for the given question is option "d". It has been seen that rivers carry with them very rich and fertile soil which the farmers prefer because the amount of crop and the quality of crop is much better than they can get in any other place. The civilization of ancient Egypt as well as the Indus valley civilization were totally dependent on the Tigris and the Indus river respectively, as far as irrigation was concerned. Seasonal flooding always brings with it new fertile soil for irrigation.
        
                    
             
        
        
        
Television
Television became one of the most important sources of entertainment to families since its invention, and it is still. virtually all families in the developed world owns a television and it virtually replaced the roles of theaters.
        
             
        
        
        
So the answer to this is Organizes National. The state's legislature functions an performs the same kind of duties in the state level, as is performed by the United States Congress at the national level.
Example to make it easier:
- Legislative :the one who create the laws - Executive : the one who impose the laws - Judicature : The one who supervise the laws
Hope this helps you!
        
                    
             
        
        
        
Answer:
The depression was caused by a number of serious weaknesses in the economy. ... America's "Great Depression" began with the dramatic crash of the stock market on "Black Thursday", October 24, 1929 when 16 million shares of stock were quickly sold by panicking investors who had lost faith in the American economy.