If a person knowingly harbors a runaway child and is negligent about their status, what offense is this?

The offense of harboring a runaway child pertains to the act of knowingly providing shelter or assistance to a child who has run away from their home or legal guardian. In this context, the individual has an awareness of the child’s runaway status and takes actions that contribute to that child remaining away from their home. This is why the correct answer accurately describes the behavior in question.

Harboring a runaway child implies not only knowledge of the child's situation but also an element of negligence regarding the child's welfare, as it suggests a willful disposition to keep the child from returning to their legal guardian. This aligns closely with legal definitions found in statutes concerning the protection of minors.

The other choices address related but distinct offenses. For example, concealment of a runaway typically refers to hiding a child from authorities rather than merely providing shelter. Child endangerment involves putting a child at risk of harm, but it doesn’t specifically address the context of a child being a runaway. Interference with custody relates to actions that violate a custodial arrangement, which may or may not involve a runaway status. These distinctions clarify why harboring a runaway child is the most precise characterization of the offense in question.