What must a person not do to a trespasser under the legal duty owed?

The legal duty owed to a trespasser is generally to refrain from causing intentional harm to them. Setting traps, which could potentially injure the trespasser, is a clear violation of this duty. Landowners must ensure that their property is not intentionally dangerous or hazardous to individuals who enter without permission.

While providing medical assistance, making them leave the premises in a safe manner, or notifying authorities can be seen as responsible actions in dealing with a trespasser, setting traps represents a proactive attempt to harm. Landowners are encouraged to protect their property, but this must be done within the bounds of the law, prioritizing safety and non-violence. Thus, the correct answer highlights the importance of the obligation not to intentionally create dangerous situations for trespassers.