Answer;
Husk.
Whole-grain flour contains all parts of the grain with the exception of the husk.
Explanation; 
Whole grain foods contains the following parts; Bran, Endosperm and Germ, originally present before processing.
Refined grains on the other hand are mainly  composed of only endosperm portion of the grain. Milling process removes bran and some also removes germ, along with the majority of fiber, vitamins, minerals, antioxidants and phytochemicals. 
        
             
        
        
        
I would say B, because as you can see from the explanation of what a luster is described is. B matches the classifications
        
             
        
        
        
Answer:
C
Explanation:
Due to the erosion of soils, no trees to protect the ground from drying out.
 
        
                    
             
        
        
        
Answer:
I think the answer the will be option 
a) the cells form long vertical tubes 
Explanation:
This is because xylem transports water and minerals throughout the plant and they are long and vertical tubes 
 
        
             
        
        
        
DescriptionThe term social order can be used in two senses: In the first sense, it refers to a particular system of social structures and institutions