You have them all correct so far.
The answer to the last one is 11034 meters. 
 
        
             
        
        
        
Natural Selection: Naturally, living organisms produce offspring that will inherit characteristics that give that offspring higher and most successful chances of survival. So offspring are naturally born with traits that suits them best for survival. Natural Selection process also consist of in comparison of living organisms, those who adapt best to their environment and have flexible characteristics survive longer than those who don't. 
        
             
        
        
        
Time
Explanation:
it changes over time because it changes the organism over time
 
        
                    
             
        
        
        
I think the scientist distinguish whether an entity is living or non living be describing the single unit of life, the live cell that could multiply, reproduce and generate trough time also through ages. I hope you are satisfied with my answer and feel free to ask for more 
        
                    
             
        
        
        
Answer:
I believe the answer is C
Explanation:
I could be wrong.