One of the reasons for the success of the smallpox eradication campaign was that small pox only occurred in humans. Smallpox is an extremely contagious and deadly virus for which there is no known cure. it is caused by two variants, Variola major and Variola minor. it is a disease of the past that was eliminated by worldwide vaccination. 
        
             
        
        
        
Answer:
It would be a form of pollution due to the runoff of chemicals which harm the marine life while helping with the growth of algea more suitably known as 
EUTROPHICATION
Explanation:
 
        
             
        
        
        
Anatomical or molecular homologous structures 
 
        
             
        
        
        
Some common adaptation in organisms would be: 
Behavioral adaptation.
Biological adaptation.
Natural selection.
        
             
        
        
        
Eye color and ear shape are inherited.
Body height is mainly inherited/ influenced. 
Species cannot be changed? So my guess is that C. Is the correct answer as it is not a inherited trait. 
If that is wrong, then the answer is D. Because I would think body height is influenced by the two parents.