Organic  means it is made only of carbon.
Explanation:
The all four types of macromolecule are organic means these all four type of macromolecule made up of carbon. These four macro molecules are carbohydrate, protein, nucleic acid and Proteins.  All are essential cell component perform a wide array of function. 
Biological macromolecule is organic so they contain carbon. A part of carbon they contain nitrogen, hydrogen and additional minor element.   Enzymes and some hormone are example of protein. 
 
        
             
        
        
        
<span>your answer is cranial cavity </span>
        
             
        
        
        
Answer:
 4 RW pink hair color 
Explanation:
Let the allele for red hair color = R
Let the allele for white hair color = W
Let the allele for blue hair color = b
Since R and W exhibit co dominance it means none of both traits have the tendency or capability to masked the other .
As such individual with RW genotype = PInk hair color
Allele b is recessive and only individuals with the genotype bb exhibit the blue allele  
Now; if a cross occurs between a red-haired Mendelian and a white-haired Mendelian
i.e 
RR   × WW
we have 
            R           R
W         RW       RW
W        RW         RW
So we have the following offspring :
4 RW = 4 pink
So theoretically , the possible phenotypes results to 4 RW pink hair color
 
        
                    
             
        
        
        
The answer is D. A species diversity