Which cycle of operations involves positioning the cartridge in the chamber?

The cycle of operations that involves positioning the cartridge in the chamber is chambering. This step is crucial in the process of loading a firearm, where the cartridge is moved from the magazine into the chamber to prepare the weapon for firing. During chambering, the mechanism ensures that the cartridge is correctly aligned and seated in the chamber, allowing for optimal performance when the firearm is discharged.

The other options represent different cycles of operation. Extraction refers to the removal of an empty cartridge case from the chamber after firing. Ejection is the process of expelling the spent cartridge case from the firearm. Cooling is not a specific operational cycle but is related to maintaining the firearm's performance and longevity by allowing it to manage heat buildup during operation. Thus, chambering is the correct answer as it specifically addresses the act of positioning a cartridge in the chamber.