On page 79 of Summer of the Mariposas it says, "Delia and Velia snerted in disgust. They turned their backs to us and opened up the containers of food"
This quote reveals that Delia and Vella...

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Explanation:

Think low of the main character. because they turned their backs when opening the food reveals that they think the main character isnt worthy enough to take a share in the food.

I'm not sure what you were completely asking for because the lack of detail, but I hope this helped

dramatic irony occurs when the reader/audience knows more about a character's situation than the character does. the one main effect is that it gives the reader a sense of superiority, or detached superiority. the reader not only seemingly discovers what is revealed, but feels superior for doing so.