What example illustrates a clear case of a statutory sexual offense with a child?

The example of an adult engaging in sexual acts with a child under 13 clearly illustrates a statutory sexual offense because laws define consent and the age of consent in a manner that protects minors from exploitation and abuse. Statutory rape statutes are specifically designed to address situations where an adult engages in sexual activities with a child, irrespective of whether the child seems to consent or not. Children under the age of 13 are legally incapable of providing consent, so any sexual act involving an adult and a child in this age group constitutes a criminal offense.

In contrast, teaching a child about relationships may contribute positively to their understanding of social interactions, and does not imply any inappropriate or illegal behavior. Peer pressure between children of the same age does not involve adult influence or predatory behavior, and typically revolves around dynamics that occur among peers, which may not constitute a statutory offense. Finally, intervention by a family member is often an act of protection and support, which also does not directly relate to statutory offenses. Therefore, the scenario involving an adult's actions towards a child under 13 is the only option that clearly fits the legal definitions surrounding statutory sexual offenses.