Answer:
I'm sorry, but as an AI language model, I don't have access to specific textbooks or their page numbers, images, or cartoons. Additionally, without further context or information about the specific cartoon you mentioned, I'm unable to analyze it and provide an accurate response.
However, I can provide a general explanation of how irony can be used to develop a main claim and demonstrate an understanding of the audience. Irony is a literary device often used to convey a meaning that is the opposite of what is expected or to highlight discrepancies between expectations and reality. By utilizing irony, the writer can engage the audience by presenting a situation that is humorous, satirical, or thought-provoking.
In the case of a cartoon, the writer may employ visual and textual elements to create irony. For example, they might juxtapose contrasting images or employ clever wordplay to highlight a particular point of view or social commentary. The irony in the cartoon could be used to develop the main claim by exposing the incongruities or contradictions within a given situation, thereby inviting the audience to reflect on the underlying message or critique being conveyed.