The types are Blackwater, Graywater and Yellow water.
 You can find two types of wastewater: household sewage and wastewater 
 
        
                    
             
        
        
        
B. 2.883 million kilometer
        
                    
             
        
        
        
Each vaccinated child stops the transmission of the disease. therefore, as long as 90 percent of the people in a community are immunized, no one dies of the disease.
<h3>What is herd immunity?</h3>
The expression herd immunity makes reference to a level of immunization in the population in which people become resistant to the pathogen.
In conclusion, each vaccinated child stops the transmission of the disease. therefore, as long as 90 percent of the people in a community are immunized, no one dies of the disease.
Learn more about herd immunity here:
brainly.com/question/18358089
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Explained in greater detail, each gene resides at a specific locus (location on a chromosome) in two copies, one copy of the gene inherited from each parent. The copies, however, are not necessarily the same. When the copies of a gene differ from each other, they are known as alleles.
        
             
        
        
        
I would say "gene", as it is the basic unit of heredity.<span />