Which describes a level III system intervention?

A level III system intervention refers to changes made at the organizational or community level that target broader policy and environmental changes, as opposed to individual behavior change or small group programs. The correct choice involves implementing a school policy that restricts sugar intake during lunch, which seeks to modify the food environment within the school setting. This kind of intervention can have a widespread effect on all students, promoting healthier eating habits and creating a supportive structure for nutrition.

Such policy-level interventions are crucial because they create a framework within which individuals can make healthier choices without having to rely solely on personal motivation or knowledge. By establishing rules that limit students' access to sugary foods during lunch, the school is directly influencing food availability and children's eating behavior on a larger scale. This aligns with the principles of community nutrition, which focus on creating healthier environments through policy changes.