What major incident must be reported if it poses a risk to children?

The correct choice is the incident where emergency services attended, as this represents a significant event that could endanger children's safety or wellbeing. Reporting such incidents is crucial because they often involve immediate risks or emergencies that require attention and may lead to further investigation about the safety measures in place.

In the context of child safety and regulations governing provider operations, incidents that involve emergency services are typically monitored closely to ensure that appropriate actions are taken to mitigate risks in the future, safeguarding the welfare of children. The involvement of emergency services, whether due to accidents or other alarming situations, signals potential threats that necessitate transparency and prompt reporting.

In contrast, routine inspections, changes in enrollment numbers, and staff changes generally do not indicate immediate danger or risk to children. While they are important operational factors, they are not categorized as emergencies or critical incidents that would require immediate reporting to protect children's welfare.