Which action is an example of aiding and abetting a crime?

Aiding and abetting a crime involves assisting, facilitating, or encouraging the commission of that crime. Providing a weapon for the crime is a clear example of this, as it directly contributes to the commission of the criminal act. This action shows intent to support the perpetrator's actions, as the weapon is an essential tool that enables the crime to occur.

In contrast, reporting a crime to authorities is an act of lawfulness and does not support or encourage criminal activity. Witnessing a crime unfold could indicate a passive bystander who is not actively involved in the crime, while ignoring a crime denotes a lack of action that does not assist or support the commission of the crime. Neither of these latter actions encompasses the proactive involvement characteristic of aiding and abetting.