Which of the following actions constitutes an offense regarding knowledge of illegal firearms?

Failing to report the location of a found firearm constitutes an offense regarding knowledge of illegal firearms because it directly relates to public safety and the responsible handling of firearms. When a person comes across a firearm that is not theirs, they have a legal and ethical obligation to report it to the authorities. This ensures that the firearm can be properly secured, preventing potential misuse or criminal activity. Not reporting such an item can lead to severe consequences, as it may allow the weapon to remain in an uncontrolled situation or potentially be used unlawfully.

In contrast, using a licensed firearm for hunting is a legal activity as long as it adheres to hunting regulations and the firearm is permitted for such use. Checking a gun's safety settings is a responsible action that helps ensure safe handling and operation of the firearm. Informing a friend about firearm ownership, in itself, does not imply illegal actions and can be part of normal gun ownership discussions. These actions do not involve the same level of responsibility and potential legal ramifications associated with failing to report a found firearm.