Which of the following is NOT a method used in arson techniques?

In arson techniques, the primary goal is to initiate and control a fire in a way that maximizes damage or achieves a specific purpose. Each of the other options describes a tangible method used by arsonists, such as preparing materials that facilitate ignition, employing tools to spread flames, or using gas to enhance fire intensity.

Using smoke to create confusion does not align with typical arson methods, as arsonists are more focused on the mechanics of igniting and controlling the fire itself rather than creating a smoke-screen situation. In fact, excessive smoke can hinder an arsonist's efforts because it complicates visibility and draws attention to the scene, potentially leading to detection or intervention before the fire spreads. Thus, this technique does not fit within the established methods employed in the deliberate act of starting and sustaining a fire for malicious purposes.