I would say <span>irritation threshold.</span>
        
                    
             
        
        
        
First: <span>you should do well the introduction has to be a deductive essay
</span><span>means that the most general look and then passes to the more specific
</span><span>placed photos accompanying biographies etc ..
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Answer:
It is a small American animal that lives underground and whose head and body are protected by a hard shell
 
        
                    
             
        
        
        
The answer is A and  b hope it helps