Answer:
C
Viruses need a host to survive.
Explanation:
 
        
             
        
        
        
Answer:
The primary threats to chimpanzees are habitat destruction, hunting, and disease. The increasing human population is encroaching ever deeper into even protected areas of chimpanzee habitats, and large scale logging is now a major threat to the forest primates of Africa.
Explanation:
 
        
                    
             
        
        
        
The excretory system allows animals to remove metabolic waste their bodies. Many of these substances are potentially toxic. in Mammals nitrogenous toxins like urea are expelled through liquid urine while in reptiles and birds the nitrogenous compounds are expelled as a solid. This allows birds and reptiles to use less water in the processes of metabolism.
        
             
        
        
        
Liver would be the answer. Hope this helps. :)