Its the letter B because its the circulatory system
        
             
        
        
        
Answer:
More nutritious food.
Tastier food.
Disease- and drought-resistant plants that require fewer environmental resources
Explanation:
 
        
                    
             
        
        
        
Rachel is a frail and fragile girl who is prone to injury and bruising William Sheldon would most likely have classified her body as a ectomorph.
William classified people according to their body into three types:  
1.	Endomorphs- rounded and soft, with comfortable and extroverted personality,
2.	Mesomorphs-square and muscular, with dynamic and aggressive personality,
3.	Ectomorphs-thin and fine-boned with introverted, and sensitive personality.