Martin Luther King Jr. played an important role in fighting against racial discrimination. The protest he led in Alabama caught the public's attention. ... He was part of a nonviolent resistant group fighting for the equal rights of African-Americans
 
        
             
        
        
        
The commas must be placed both before and after the nonessential element. For example...
My mom, who hates cooking, ordered takeout.
"who hates cooking" is the nonessential element, and you can see that a comma goes before and after it.
        
                    
             
        
        
        
Answer:
Humans encounter great difficulties
Explanation:
impacts since the story says so