Read this example: dr. william leu, a board certified cardiologist with over twenty-five years of experience, believes that patients who eat whole foods and a diet low in sodium are 75 percent less likely to suffer from heart problems than patients with poor diets that are high in saturated fats and salt. dr. leu's research also concludes that the consumption of highly processed foods is a contributing factor in several heart-related issues, such as coronary artery disease and hypertension. which two forms of rhetoric are used in the example