Respuesta:
B. pastoreo excesivo de animales de granja
Porque son lugares secos.
Explicación:  
Las políticas e infraestructuras que promueven la agricultura en las tierras de pastoreo que no pueden mantener sistemas viables de cultivo, contribuyen a la desertificación. La mayoría de las áreas de tierras secas (el 65%) son tierras de pastoreo que son más adecuadas para el pastoreo sostenible que para el cultivo.
 
        
                    
             
        
        
        
Base on the given scenario, a sociologist might view the
doctor’s recommendation as a result of belief in a binary sex system of which
the social norm is about in terms of topics related with the gender and sex of
humans and the doctors recommendations are all because of their beliefs and
perspectives that they had acquire.
 
        
                    
             
        
        
        
Answer: The theory of cheek cells is used for the identification of cheek cells. 
Explanation:
The cells of cheek do not have cell wall. They have a cell membrane which allows on certain molecules to pass through it. The nucleus is located centrally in the cheek cells and it stores the DNA. It can be stained with the help of the methylene blue reagent. It appears blue in color which can be observed under the microscope. The cheek cells can be isolated from the buccal cavity by using cotton buds and cotton swabs can help in isolating the cells. 
 
        
             
        
        
        
<span>The female is born with about one million immature sex cells.</span>
        
                    
             
        
        
        
I believe the answer would be Letter 
B. Psychology