Leptin  hormone  is  the  hormones  which  appears  to  be   designed  to  protect  the  body  against  weight  loss.
    Leptin  hormone  is  secreted   from  fat  cells  and  it  helps  to  regulate  body  weight.  Leptin  hormone   is  predominantly made  by  adipose  cell that    help  to  regulate  energy  balance   by inhibiting  hunger. leptin  hormone  is opposed  by  the  action  of  the  ghrelin  hormone which  is  a  hunger  hormone/
        
             
        
        
        
The hind legs, I believe. That's why they are longer and stronger.
        
             
        
        
        
The hypothalamus sends signals to the pituary glands. The hypothalamus releases dopamine, so I think dopamine is a good answer?
 
        
             
        
        
        
Physical chemists study matter and energy, and there is chemical reactions in your body, and all living things have elements, like carbon.
I would say D