Final answer:
The Fentress NALF Airport (NFE) is in Class E airspace, which is controlled airspace designed for IFR operations.
Step-by-step explanation:
The Fentress NALF Airport (NFE) is located within Class E airspace. Class E airspace is generally controlled airspace that extends upward from either the surface or a designated altitude to the overlying or adjacent controlled airspace. It is designed to provide a controlled environment for conducting instrument flight rules (IFR) operations. The airspace configurations can sometimes be complex, but they are depicted on aeronautical charts that pilots use for navigation. When examining such a chart, one can see the airspace classification surrounding NFE.