Final answer:
The Special Use Airspace that is necessary to confine activities considered hazardous to nonparticipating aircraft is called Restricted Area.
Step-by-step explanation:
The Special Use Airspace that is necessary to confine activities considered hazardous to nonparticipating aircraft is called Restricted Area. Restricted Areas are areas of airspace designated by the FAA where certain activities are conducted, such as military training exercises or missile launches, which may pose a hazard to aircraft in the area. These areas are depicted on aeronautical charts and pilots are prohibited from entering them without authorization.