Answer:
c. parasite
Explanation:
the barnacle benefits from the host while the host is harmed from the barnacle 
 
        
             
        
        
        
Reproduction 
Additional info-
https://courses.lumenlearning.com/biology2xmaster/chapter/classification-of-fungi/
 
        
             
        
        
        
6)active immunity occurs when the person is exposed to a live pathogen and passive immunity<span> can occur naturally.
7) you can buy bacteria killing soap and keep your house bacteria free. wipe down everything that hands touch everyday. 
hope this </span>helps. :) 
        
             
        
        
        
The answer is Rewrite
Hope this helps! :P
        
             
        
        
        
Answer:
The answer is B, extensive research of an individual organism over many years.
Explanation:
The question is asking, what best describes Darwin's studies that led to the theory of evolution, it would be a lot of research over a long period of time. Think, if you were to do a school project, would you get your best results over a short or long period of time with little or a lot of evidence/research? So, B is the best answer, I believe.
(PLEASE BRAINLIEST)