In the earliest stages of development, all four organisms have a knobby head, gill slits, and a tail. These similarities tell us that all four of these organisms have a common ancestor.
 
        
                    
             
        
        
        
I’m pretty sure the answer is A or c 
I hope this helps narrow down choices
 
        
                    
             
        
        
        
Lithosphere is the correct answer
cause hydrosphere is water
and stratosphere and atmosphere are part of the air