Answer:
Moving air masses cause the weather to change when they contact different conditions. For example, a warm air mass moving over cold ground may cause an inversion. ... Cold air masses tend to move toward the Equator. Warm air masses tend to move toward the poles.
 
        
             
        
        
        
They can identify disorders and diseases from DNA
        
                    
             
        
        
        
Explanation: Rivalry
There is safety in numbers, and with that, they can run together more often without the fear of being attacked, and must push themselves to match others, therefor getting fit
 
        
             
        
        
        
Answer:
The correct answer is B
Explanation:
Because Thats how it works.