I believe the correct answer is Ww
This question was kind of difficult :/
 
        
                    
             
        
        
        
Answer:
When movement of an object occurs work is measurable.
 
        
             
        
        
        
Answer:
Both A and B
Explanation:
Burning fossil fuels produces carbon dioxide.
Cellular respiration produces carbon dioxide. 
Both produce carbon dioxide. 
Both A and B.
 
        
             
        
        
        
Answer:
Your heart has to work more to pump blood through your body faster
Explanation:
 
        
             
        
        
        
Hunting, I believe. Hope this helped