Final answer:
In shotguns, 'choke' refers to the taper at the end of the shotgun's muzzle, which affects the spread and range of the shot.
Step-by-step explanation:
In firearms terminology, specifically when referring to shotguns, the term "choke" is A. The taper at the end of the shotgun's muzzle. This refers to a constriction of the bore at the muzzle end of the barrel, which shapes the spread of the shot to achieve different patterns and ranges. Choke can affect the shot's effectiveness and precision, making it a significant aspect of a shotgun's performance for activities like hunting or competitive shooting. It is not related to the spring depicted ,nor does it involve shooting while being strangled, which would be an incorrect interpretation of the term.