There was fertile land in the area known as the willamente river valley 
        
                    
             
        
        
        
Answer:
Boomerang generation
Leaving and returning is not a Revolving type of existence 
Explanation:
This is the term used for the recent young generation that returns home after leaving even after establishing independence household due to effect of financial recession.
Revolving type of existence is not a socioeconomic effect but a mental health syndrome where the patient gets better for a while before returning to it's previous state of mind.
 
        
             
        
        
        
The answer is C a census includes the entire population where as a sampling only a part
        
                    
             
        
        
        
 Mohenjo-daro (from the Sindhi language: Mount of the dead) is an archaeological site in today's Pakistan. 
The culture that created it is the Indus Valley Civilisation, which founded a settlement on the site around 2500 BCE. 
Currently the site is threatened and is in a dire need for restoration or it might be completely destroyed soon.