Which of the following is a component of Defensive Counter Air (DCA)?

Defensive Counter Air (DCA) refers to measures designed to detect, deter, and defend against enemy air threats, which could include enemy aircraft or missiles. Missile Defense Systems are specifically designed to protect against incoming missiles by tracking, intercepting, and destroying those threats before they reach their intended targets. These systems are integral to the DCA mission as they directly address the need to safeguard airspace and ensure the safety of both ground assets and civilian populations.

Other options do not align as directly with the core responsibilities of DCA. Cyber Intelligence focuses on gathering and analyzing cyber threats rather than air threats. Informational Warfare deals with manipulating information to influence and disrupt adversaries but does not provide a direct defense against aerial threats. Weapon Supply Chains refer to the logistics and management of weapons but do not pertain to the immediate defense against air threats. Therefore, Missile Defense Systems stand out as the essential component of Defensive Counter Air.