C ........................i think
        
             
        
        
        
Explanation:
guessing 
amino acid?
protein building blocks
peptide bonds hold them together
 
        
             
        
        
        
The answer is C because the key is “group that live in the same area”
        
             
        
        
        
Answer: No, a limiting factor is something that you can’t survive without. 
Explanation: Poaching is not a limiting factor.