Whether or not it is relevant and/ or reliable. 
        
             
        
        
        
Answer:
groups by the fact that they share a common interest, background, or purpose that gives them a sense of cohesion
 
        
                    
             
        
        
        
Urban means city or surrounded by many.  Rural means country or secluded (set off by itself).  Therefore, these two are antonyms.  A synonym for Urban would be city, crowded, large population.  A synonym for Rural would be country, seclusion, less populated.  Since antonyms are the opposite, that makes urban and rural antonyms.
 
        
                    
             
        
        
        
The Earth'sinterior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball, about 1,500 miles (2,400 kilometers) in diameter. ... Above the inner core is the outer core, a shell of liquid iron.
        
                    
             
        
        
        
I think “Today, Paul Kramer’s paintings, which hang in a Minnesota museum, highlights the connection between the towns past and its future.”