Available in emergency situations, __________ can cover enormous areas, allows sky view of fleeing persons or vehicles, and are excellent apprehension tools when used with ground units.

The correct answer emphasizes the use of aerial support in emergency situations, which is a critical element in law enforcement operations. Fixed wing aircraft and helicopters can cover vast geographic areas quickly, providing real-time surveillance that is invaluable during pursuits or search and rescue operations. Their ability to maintain a bird's-eye view allows officers to track fleeing suspects or vehicles from above, coordinating effectively with ground units to enhance the chances of successful apprehension.

This aerial capability significantly increases situational awareness and can provide support in various scenarios, from monitoring large crowds to assessing strategic locations during critical incidents. The agility and reach of air support make it an essential tool for law enforcement agencies when rapid response and comprehensive coverage are needed.

Other options, while useful in their contexts, do not offer the same level of extensive area coverage or aerial perspective that fixed wing or helicopter patrols provide. For instance, ATV and bike patrols are limited to ground-level operations and might be less effective in rapidly changing situations that require a broader aerial view. Drone surveillance, although beneficial, typically offers a different approach than traditional aircraft in terms of operational capacity and may not perform at the same scale or speed as manned aircraft in urgent scenarios.