Answer:
Virus 
Explanation:
A Virus can cause infections and disease due to the Virus needing a host to reproduce. 
 
        
             
        
        
        
Answer:
Explanation:
When organisms become isolated the two groups are also not able to reproduce together, so in one group are not necessarily found in the other group. The longer the groups are isolated, the more different they are. They eventually become different species.
 
        
             
        
        
        
A heterotroph relies on other animals for food so it would be B and all the other answers are all producers
        
             
        
        
        
Answer:
I believe the awnsner is medicine. ((Not completely sure))
Explanation:
I think so because medicine is usually used to help defeat a sickness and not as much as repairing something that's wrong.