Final answer:
Intercalary chapters in The Grapes of Wrath tell a bigger story about the Dust Bowl, highlight contrast between the Joads and others, and provide social commentary.
Step-by-step explanation:
The intercalary chapters in The Grapes of Wrath are used to tell a bigger story about the Dust Bowl. These chapters provide a broader context and social commentary on the events depicted in the main narrative. They focus on the plight of various characters and communities affected by the Dust Bowl, rather than just one small family like the Joads. By presenting different perspectives and experiences, these chapters highlight the contrast between the Joads and others, as well as shed light on the social, economic, and environmental issues of the time.
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