Im pretty sure its d) Lipids
        
             
        
        
        
Answer:
Its energy fuel has ran out.
Explanation:
 
        
             
        
        
        
Body b will have a force 4 times stronger than body a, causing body b to reverse the direction of body a
        
             
        
        
        
Metals, non metals, and metalloids
        
             
        
        
        
Answer:
When heated too much, enzymes (since they are proteins dependent on their shape) become denatured. When the temperature drops, the enzyme regains its shape. ... Changes in pH will also denature the enzyme by changing the shape of the enzyme. Enzymes are also adapted to operate at a specific pH or pH range.