The water cools your body down. It helps the body maintain its body temperature
        
             
        
        
        
Answer:
This is an example of founder effect. 
Explanation:
Founder effect may be illustrated as the loss of genetic variation in a novel small population originated from the original population. The concept was initially presented by Ernst Mayr. It can be seen that genetic diversity has got reduced in the population of iguana due to the result of the flood that has washed all the iguana without webbed feet into the sea.  
The new population has got inclined from the small iguana population. Thus, the iguana population is regarded as an illustration of the founder effect.  
 
        
                    
             
        
        
        
The number of connections among species
        
                    
             
        
        
        
The question is B soil erosion upstream