It's called chemical reaction.
(I'm not real sure)
        
             
        
        
        
Answer: Methamphetamine
Explanation: Methamphetamine is a potent central nervous system(CNS) stimulant that is mainly used as a recreational drug and less commonly as a second line treatment for attention deficit hyperactivity disorder and obesity.
 
        
             
        
        
        
The answer for this one is B. I hope I help! :)