Contrast example and non-example are the examples that define the differentiabilty by comparison between two or more terms, object, people etc.It helps induces clarification and understanding in people for the topic. Concept, relationship,relevance etc is depicted through this technique.
According to the question,Sheri should contrast example and non example technique to make the audience understand about mesothelioma.She can compare and differentiate the concept for clear explanation.
