Cyclist is to ride as pedestrian is to walk.  You see, if you are a cyclist you would be riding a bike.  And if you were a pedestrian you'd be walking.  
        
             
        
        
        
The best answer for this question would be:
Alvarez grappled with the issue of writing a novel about a dangerous subject.
A central idea focuses on the dominant impression of a story in which a general truth of the story is found within it.
 
        
                    
             
        
        
        
Answer:
A. Non sequitur
Explanation:
Non Sequitur is a type of logical fallacy that forms a conclusion or response that is not logically connected to the previous statement.
From the example, <em><u>Ever since the new casino opened unemployment in this city has gotten out of control </u></em>, there is no logical connection between the increased unemployment in the city and the new casino.
There would have been a logical conclusion if the statement was written like this,
<em>People who are caught gambling are fired, so since the new casino opened, the unemployment in the city has gotten out of control.</em>
<em></em>
People who are caught gambling are fired is the premise and connects the next statements about unemployment rates increasing and the new casino in town.
Therefore, the logical fallacy that takes place is Non sequitur as it has no logical connection to the premise.