Final answer:
The main goal of Healthy People 2020 is to provide access to preventive health-care services.
Step-by-step explanation:
The main goal of Healthy People 2020, due to health concerns for high-risk populations, is to provide access to preventive health-care services. This means focusing on promoting regular checkups, screenings, and vaccinations to prevent disease and maintain overall health. By providing access to preventive care, the goal is to improve the health outcomes for high-risk populations and reduce healthcare costs in the long run.