Which are the two methods of delivering strikes?

The methods of delivering strikes are best characterized by "penetration and snap-back." This terminology captures the fundamental aspects of how various strikes are executed in martial situations.

Penetration refers to the action of thrusting a strike with the intention of making contact deep into the target, aiming to deliver maximum impact and effectiveness. This is essential in many self-defense tactics, as well as in various forms of combat sports and martial arts, where the goal is to break through an opponent's defenses.

Snap-back describes the quick recoil of a limb after delivering a strike. This technique not only maintains the practitioner's balance but also positions them effectively for follow-up actions. The snap-back helps to avoid creating openings for counterattacks, ensuring that the striker can effectively defend or continue their offensive actions immediately after striking.

Both elements are crucial for effective striking techniques and demonstrate an understanding of the dynamics involved in physical confrontations. Other choices, while they may describe aspects of movement or types of actions, do not comprehensively encompass the concept of strike delivery methods as clearly as penetration and snap-back.