There is 4 different words.
        
             
        
        
        
We can see that the research question that is most effective is: D. What are fossil fuels?
<h3>What is research question?</h3>
Research question is actually known to be a question which is asked by a researcher which forms the basis for his evaluation, examination, and experimentation. Every good research question must be clear and focused.
We see that the selected answer is actually clear and focused and covers other aspect of the research.
Learn more about research on brainly.com/question/6947486
#SPJ1
 
        
             
        
        
        
Answer:
It reveals his respect for artistic tradition.
 
        
             
        
        
        
Answer:
the claim supports the argument, or backs it up.
 
        
                    
             
        
        
        
Answer would have to be B.