Which formation is used primarily in restrictive terrain?

The correct formation used primarily in restrictive terrain is the Cloverleaf formation. This formation is characterized by its ability to provide mutual support and flexible movement through limited spaces, such as densely forested areas, urban environments, or areas with significant obstacles. The Cloverleaf formation allows units to maintain optimal situational awareness and rapid communication while maneuvering.

In restrictive terrain, visibility and maneuverability can be severely limited, so the Cloverleaf's design supports quick adjustments and coordinated movements necessary to respond effectively to threats or changes in the environment. This adaptability makes it suited for navigating the challenges presented in such terrains, as it promotes safety and efficiency for units operating in close proximity to one another.

Other formations, while effective in various contexts, do not offer the same level of flexibility and support required in restrictive environments, which is why the Cloverleaf is identified as the most appropriate choice.