It is c your answer for your questions
        
                    
             
        
        
        
The more the people, the more  pollutant they generate which will pollute the the water.
        
             
        
        
        
The probability that a homozygous recessive individual would be producing a dominant allele would be 0%. If expressed as a percentage, this is because the individual does not even have the possible allele in its genotype for whatever trait or feature that the protein codes for.