Answer:
The last one if there are multiple answers please tell me.
Explanation:
just when with the one i knew in heart
 
        
             
        
        
        
Answer:
Explanation:
Matter can change form through physical and chemical changes, but through any of these changes matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.