Answer:
I think the answer is B, Rivers. Mountain ranges don't really help the environment much as can mostly only change the climate. 
 
        
                    
             
        
        
        
You should: 
1. Keep a distance between you and the source. 
2. Use shielding between you and the radiation source.
3. Reduce the time you are being exposed.
 
        
                    
             
        
        
        
Answer:
The correct answer is: Eighteen times more ATP is formed during aerobic respiration than during anaerobic respiration. 
Explanation:
During aerobic respiration 36 ATP are formed. In contrast, in anaerobic respiration (lactic and alcoholic fermentation) only 2 ATP, obtaining energy from pyruvate during glycolysis.
 
        
                    
             
        
        
        
Replication is when you copy something, and repetition is when you keep doing it over and over again. i hope this helps :-D