Answer:
C
Explanation:
This is the only answer that logically makes sense with the question 
 
        
                    
             
        
        
        
Answer:
Photosynthetic organisms were making oxygen, but it reacted with the iron dissolved in seawater to form iron oxide minerals on the ocean floor, creating banded iron formations. ... The oxygen that is now in the Earth's atmosphere was not there at the beginning.
Explanation:
 
        
             
        
        
        
Answer:
Hm
Explanation:
Try a few things like an airplane, jetpack, etc
 
        
                    
             
        
        
        
The B.genetic diversity because, variation is diversity so it would be between b and d but genotype has to deal with the genetic code leaving B.