What development was prompted by the initial response to the Korean War?

The correct response to the development prompted by the initial response to the Korean War is the Composite Air Strike Force, often referred to as Composite Wings. This was established in direct reaction to the rapid mobilization and operational needs highlighted during the conflict. The Korean War underscored the importance of having flexible and rapidly deployable air power that could operate in conjunction with ground forces in a theatre of war.

The Composite Air Strike Force allowed for a combination of various aircraft types and operational capabilities within one organizational framework, enabling commanders to adapt to changing battlefield conditions effectively. This innovation sought to enhance coordination and increase the effectiveness of air operations in support of joint operations.

While the Unified Combatant Command, Joint Task Force, and Air Expeditionary Force are significant developments in military structure and operations, they were either influenced by broader strategic needs or came about in different contexts, making the Composite Air Strike Force the most direct response to the operational challenges observed during the early phases of the Korean War.