Which of the following strategies is classified as a weaponless defense technique?

Joint locks are classified as a weaponless defense technique because they utilize the body's natural mechanics to control a person without the need for deadly force or weapons. This technique focuses on manipulating the joints of an opponent to gain control or to subdue them. The primary goal is to apply pressure to a joint in a way that is uncomfortable, causing the opponent to comply without inflicting serious injury.

In contrast, tackling involves a physical takeover that could potentially cause harm, while striking directly engages with a person in a way that constitutes an offensive action. Choke holds, although sometimes used for restraint, involve applying pressure in a manner that can be dangerous and is generally not considered weaponless due to the risk of serious harm. Thus, joint locks stand out as a controlled method of defense emphasizing technique and body mechanics over force.