Which type of homing involves a missile that contains a power source and illuminator beaming energy at a target?

The choice of active homing is accurate because this type of guidance system involves a missile that has its own onboard power source and an illuminator that emits energy directed at the target. The missile's onboard radar or laser system actively engages the target, meaning it processes the reflected energy from its own emissions to navigate and strike the target. This self-sufficient approach allows for greater flexibility, as the missile can adjust its trajectory based on real-time data it receives, optimizing its ability to hit the target even under changing conditions.

In contrast, semi-active systems rely on an external source, such as an aircraft or ground radar, to illuminate the target. The missile does not generate its own guidance signal but instead homes in on the energy reflected from the target, making it dependent on external illumination.

Passive systems detect and home in on energy emitted by the target itself, such as heat or radar, without emitting their own signals. This stealthy approach aims to avoid detection.

Semi-passive systems also utilize an external illuminator but require the missile to receive the signal rather than generate it, combining elements of both active and passive techniques.

Therefore, the defining characteristic of active homing is its internal power source and ability to direct energy, making it distinct from the other types