Which major provision of the Affordable Care Act requires new health plans to cover certain preventive services?

The choice that correctly identifies the major provision of the Affordable Care Act (ACA) requiring new health plans to cover certain preventive services without cost-sharing is the one related to no cost-sharing for preventive services. This provision ensures that individuals can access essential preventive health services—such as vaccinations, screenings, and annual check-ups—without incurring out-of-pocket expenses, thereby encouraging preventive care and improving public health outcomes.

By eliminating cost-sharing, the ACA aimed to increase the utilization of preventive services, align health care practices with a preventive care model, and ultimately reduce health care costs in the long term through early detection and management of health issues. This provision is integral to the law's mission of promoting better health care quality and affordability for all Americans.