A.  If the optimum temperature for a cell's functions is exceeded, chemical reactions slow down as enzymes and other proteins begin to denature (change shape due to increased vibration of the atoms in the molecules that make up the proteins).
 
        
                    
             
        
        
        
Answer:
• covers the body and  makes up inner lining
 • protects against  damage, dust, bacteria  
Explanation:
 
        
             
        
        
        
Based on the symptoms present, he could be experiencing hyperglycemia. 
 
        
                    
             
        
        
        
Answer:  the <span>Permian–Triassic extinction event ; {"end of the Permian era"} .
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I believe that the answer would be Region D!
So the answer should be A!