Your question is not quite clear. A rifle or shotgun is held by the stock (part that goes against shoulder) and the forearm (part held by the NON-trigger hand) A handgun is held by the grip, which is covered by the grips (properly called stocks).
Hand wheel is the control consisting of a wheel whose rim serves as the handle by which a part is operated
The tang is the part of a knife that serves as the handle to blade junction. It either goes in the handle or attaches to it dependant on what type of tang it is. The strongest type is the full tang while the weakest would be the rat or half tang.
The arm serves as the handle for carrying a microscope. It is typically located on top of the microscope and is used to lift and transport the device safely and securely.
firingpin
Until someone teaches them, all of them.
The ejector
pART OF THE SN
Handle
For the most part, no, but there may be exceptions. I would suggest asking a lawyer who specializes in firearm law.
Assume a firearm is loaded until you have personally checked it. After checking it, leave the action open. Keep your finger out of the trigger guard until ready to fire. Do not point a firearm at anything you do not mean to destroy. If you are a youngster, I would add to that do not touch or handle a firearm except when with a responsible adult.
They can under adult supervision. This is the age to learn respect for, and how to handle a firearm.
handle