The answer is Stomach
this digestive acid is usually called gastric acids.The gastric acids in our body is powerful enough to destroy a metal.
This process is happening before the digested foods enter the small intestine 
        
                    
             
        
        
        
Respect like caring of others feelings and doing them right.
        
                    
             
        
        
        
I think it’s B. The climate changed, and crocodiles could not survive in this region,
it sounds right 
hope this helped! :)