Answer:
The author most likely includes this supporting text to <em><u>reinforce the case study's point that bird flu is dangerous</u></em>.
Explanation:
The book "When Birds Get Flu" by John DiConsiglio delves into real cases of how people contract the bird flu. The book discusses infection cases and how avian influenza or bird flu began in Washington.
In the statement from the book, the author remarks that <em>"one or two sick chickens could infect a whole town [which could in turn] infect the country—or even the world."</em> By emphasizing the seriousness and infection level of the flu, <u>John DiConsiglio seems to reinforce the dangerousness of the bird flu.</u>
Thus, the correct answer is the first option. 
 
        
             
        
        
        
It's probably: Sure enough, Shiro was waiting for his master and the evening tid-bit. Then the old man said “Chin, chin!” and Shiro sat up and begged, and his master gave him the food, or maybe: <span>The happiest hour of the day both for the old man and his dog was when the man returned from his work in the field, </span>
        
             
        
        
        
They’re similar since they end in -ter and -tor, which generally sound similar, but they’re different as “director” is a noun meaning a person who directs something, while “shatter” is a verb meaning to break something into tiny pieces (you can shatter a window, a glass, a plate, etc).
        
                    
             
        
        
        
Answer:
density is defined as the mass of a substance per unit volume, and is highly variable in crustal rocks. Rock density is a physical characteristic that is governed by the chemical composition (in situ minerals) and pore spaces of a specific rock or rock type.
Explanation:
 
        
             
        
        
        
I'll answer your question in the comments but what are the 2 sentences?