Final answer:
The subject of this question is Physics, specifically the concept of inertial confinement. This technique uses multiple lasers to disrupt missile threats by evaporating and crushing tiny fuel pellets, creating high-density plasma that disrupts the missile's tracking ability.
Step-by-step explanation:
The subject of this question is Physics. Specifically, the concept being referred to is that of inertial confinement, which is a technique that uses multiple lasers to track and disrupt missile threats. In this technique, the lasers are aimed at tiny fuel pellets, heating them up and evaporating the confining pellet, which creates a high-density plasma that disrupts the missile's ability to track its intended target.