Many people hate shots and don't receive the vaccination, causing many illnesses spread around.<span />
        
                    
             
        
        
        
It’s in the picture so They travel slower than p waves, they result in much ground motion, they are produced by p and s waves
 
        
                    
             
        
        
        
Answer: E.  reforestation
Explanation:
Reforestation is a process of planting trees in an area so as to conserve the land as future forest. According to the given situation, reforestation is the practice which can be used by the biologists to grow nitrogen fixing plants in an area so as to increase the nutrient concentration of the soil which have been depleted. 
 
        
                    
             
        
        
        
Answer:
A
Explanation:
although they may evolve, done if the matter will remain the same.