The responsibilities held by the federal government from the options you've provided include:
- Protecting national parks - The federal government is responsible for managing national parks through agencies like the National Park Service.
- Administering healthcare - The federal government plays a role in administering healthcare programs, such as Medicare and Medicaid, although state governments also have significant responsibilities in this area.
- Providing social security - The federal government administers the Social Security program.
The other options listed (managing inner-city traffic, creating garbage collection services, and chartering city government into existence) are typically responsibilities of state and local governments rather than the federal government.