What type of airspace requires special attention for RPA operations?

The correct choice recognizes that controlled airspace requires special attention for Remotely Piloted Aircraft (RPA) operations due to the presence of manned aircraft and the regulations governing their operation. Controlled airspace is characterized by specific requirements for air traffic service and operates under established air traffic control rules. This means that before conducting RPA operations in controlled airspace, pilots must ensure they have obtained proper clearances and understand the airspace classification, as well as any restrictions or requirements that may be in place.

In contrast, the other types of airspace may have different operational considerations. Uncontrolled airspace does not have the same level of oversight from air traffic control, which may present different challenges. Restricted airspace often has specific activities or hazards that are temporarily imposed, and military airspace can have restrictions due to military operations, but these do not inherently involve the same level of real-time management and coordination with air traffic control as controlled airspace does. Therefore, the emphasis on controlled airspace is critical for the safe and compliant operation of RPAs.