Answer:The placement of fossils throughout the sruface layers of earth
Explanation: 
 
        
                    
             
        
        
        
<span>a strong downward current of air from a cumulonimbus cloud, usually associated with intense rain or a thunderstorm.</span>
        
                    
             
        
        
        
The rekation between inslin and glucagon is they both secrete a harmones in respone to blood sugar levels,but in opposite fashion.
        
             
        
        
        
B a very large molecule made of smaller molecules