Answer:
Organism, Organ System, Organ, Tissue, Cell    
 
        
             
        
        
        
Answer: I think it‘s 1, it just makes more sense. Sorry if I am wrong but hope this helps anyone.
 
        
                    
             
        
        
        
Ebolavirus, genus of viruses in the family Filoviridae, certain members of which are particularly fatal in humans and nonhuman primates. In humans, ebolaviruses are responsible for Ebola virus disease (EVD), an illness characterized primarily by fever, rash, vomiting, diarrhea, and hemorrhaging.