Which of the following methods is classified as a "mobile" attack unit employment method?

The method identified as "Movement to contact" is classified as a mobile attack unit employment method because it involves deploying forces to make contact with the enemy in order to engage them. This method prioritizes mobility and flexibility, allowing units to adapt quickly to the battlefield’s dynamics. It enables the attacker to seize the initiative by maneuvering to find and engage enemy forces, thereby disrupting their plans and operations.

In contrast, siege warfare typically involves surrounding and isolating an enemy position, which requires a fixed and prolonged commitment rather than mobile maneuvering. Static defense focuses on holding a specific location, also relying on established fortifications and positions rather than movement. Last stand operations imply a defensive scenario where forces remain in position to fight to the end rather than maneuvering towards the enemy. Therefore, the choice of Movement to contact effectively captures the essence of a mobile offensive approach within military tactics.