The answer is continental drift. 
Continental drift is the geological theory that explains how continents move through Earth's surface. All continents were once connected as one supercontinent Pangea. On that supercontinent, many related species, such as llamas and camels, lived together on one location. But after continents spread apart, related species were separated on different continents and adapted to different conditions
        
                    
             
        
        
        
D., the net charge of molecules.
        
             
        
        
        
An adaptive feature is some something that the character can develop in its lifetime, an example can be the adaptive feature of fitness. the characters has started to go to the gym four times a week this past month.