Soldier battle is the answer that I think it is 
 
        
                    
             
        
        
        
Answer: "It's a dog" and "Who's that?"
Explanation:
The comma is putting together and shortening 'it is' and 'who is'.
 
        
                    
             
        
        
        
The central idea revolves around that question. Is 16 too young to drive a car? It presents evidence, facts, and arguments to make the point of either 16 isn't too young or 16 is too young.<span />
        
                    
             
        
        
        
Answer
What is the "unfinished work" Lincoln mentions in paragraph 3? Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal.