Hey!
This paragraph is in chronological order!
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you should first determine the purpose of your speech.
you cannot select a topic without knowing the main purpose.
Answer:
As Steinbeck wrote, the intercalary chapters are in place to evoke an emotional response from the readers of The Grapes of Wrath. Whether they are explanatory, sermon-like, or metaphorical, they approach the reader in a 'big picture' way that the narrative chapters cannot.
Explanation: