Which cycle of function includes the action of preparing the weapon to fire?

The action of preparing the weapon to fire is best described by the term "cocking." This process involves pulling back the firing mechanism, which readies the weapon to discharge ammunition. In many firearms, this is a critical step that ensures that the weapon is in a state to fire when the trigger is pulled. It's important for the functioning of the weapon as it engages the firing pin with tension, making it capable of striking the primer of the cartridge when the trigger is activated.

Cocking is distinct from the other terms as "locking" generally refers to securing the mechanism that holds components in place, "chambering" involves placing a round into the chamber ready for firing, and "extracting" deals with the removal of spent cartridges from the firing chamber after a shot has been fired. Each of these actions plays a role in the operation of a firearm, but cocking specifically prepares the weapon for the act of firing, making it the most appropriate choice.