Answer:
The type of disease prevention being presented in this scenario is "health promotion."
Step-by-step explanation:
Health promotion refers to activities and interventions that aim to improve an individual's or community's health and well-being, prevent health problems, and enhance the overall quality of life. In this case, the dentist is recommending flossing as a preventive measure to protect Susie's gums from gum disease. By encouraging this behavior, the dentist is promoting Susie's oral health and preventing potential issues like gum disease.