The persuasive technique used in the cartoon is labeling to highlight educational disparities.
Labeling (clearly establishing what something stands for) is the persuasive technique used with the words 'Suburban Heights Public School' and 'Inner City Public School' in the cartoon.
This technique involves clearly identifying and categorizing entities, in this case, different types of schools, to convey a specific message or opinion.
In the context of the cartoon, the labeling of the schools serves to highlight and contrast the disparities in education quality and resources between suburban and inner-city areas.
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