Answer:
B.  preservation of advantageous genetic mutations
Explanation:
The process of natural selection involves the preservation of advantageous genetic mutation in a given population. 
Natural selection is one of the key factors that ensures the evolution of organisms. 
- Desired traits that are able to survive adverse conditions like disease, food shortage, natural disasters are favored by the process of natural selection. 
- Traits that also undergo advantageous genetic mutation in order to get a competitive advantage is also accrued to natural selection. 
 
        
             
        
        
        
It should be noted that a cell simply means the basic building block of living things and the human body has million of cells.
<h3>
What Is A Cell?</h3>
Your information is incomplete. Therefore, an overview of cells will be given. Cells provide the structure for the body and take in nutrients that are used to perform specialized functions in the body.
A cell can also be defined as the smallest unit of an organism that has a nucleus. It should be noted that the size of a cell can be measured by using an eyepiece graticule. 
Learn more about cells on:
brainly.com/question/3717876
 
        
             
        
        
        
Your answer is:
A. mRNA
B. Transcription 
C. Translation 
D. DNA
E. Polypeptide