II. Body paragraph: structure of the National Park Service (NPS)III. Body paragraph: function of the National Park Service

Which sentence creates the best transition between these paragraphs?

The NPS contains seven regions in its structure.
The function of the NPS is to manage national land.
The structure of the NPS helps it accomplish its function.
The NPS has many different functions and purposes

The structure of the NPS helps it accomplish its function.