Animals absorb oxygen and release carbon dioxide in respiration and plants absorb carbon dioxide and release oxygen through photosynthesis.
 
        
             
        
        
        
Its C. W<span>hen rust forms on iron, the iron atoms combine with oxygen atoms in the air to form a new substance that is made of both iron and oxygen. Hope this helps!</span>
        
             
        
        
        
Answer:
I think it would be like how the earth formed and other planets except way smaller but I'm not sure