The correct answer is D.
The author talks about the great diversity of birds that can be found Madagascar's fauna and thinks this is "triuly marvelous". 
By saying this, the author is giving his personal opinion and thoughs, making the statement subjective, rather than objective.
 
        
                    
             
        
        
        
What book is this ? sorry i am almost positive this is to kill a mockingbird 
        
             
        
        
        
Paper and concrete is the right answer hope it helps
        
                    
             
        
        
        
To tell you a story, and perhaps to teach you something