Final answer:
Tatiana should organize her speech using a cause-and-effect structure to explain the relationship between vaping and lung diseases.
Step-by-step explanation:
Tatiana read an article from the Reader's Digest on the relationship between vaping and lung disease and aims to organize her speech to reflect her findings and understanding. Considering the content of the article, which likely details how the act of vaping leads to health problems such as lung disease, the speech organization would be best suited to a cause-and-effect structure. This type of outline will allow her to provide a clear understanding of the relationship between the actions of vaping as the cause, and the lung diseases as the effect. She can structure her paragraphs by enumerating various causes, such as vaping containing harmful chemicals, and the effects they have, for instance, the development of respiratory issues. Through cause-and-effect writing, Tatiana can answer questions like "Why?" which helps readers understand the connections between the rise in vaping and the increase in lung diseases.