The thing that happen between chapter 21 and chapter 22 is the tone permanently changes to a more cynical attitude and this is the significant structural shift. The answer to this question is which asking about what happen between chapters 21 and 22 is that the  tone permanently changes to a more cynical attitude.
        
                    
             
        
        
        
Answer:
40degree C and 104 degree C
Explanation:
Greece has a warm Mediterranean climate. In summer (June to August), dry hot days are often relieved by stiff evening breezes, especially in the north, on the islands and in coastal areas. Athens can be stiflingly hot, with temperatures occasionally exceeding 40°C (104°F) in July.