Assess the ability to design a comprehensive, community-based intervention to reduce adolescent obesity that integrates behavior-change theories (e.g., Social Cognitive Theory, Ecological Model), nutrition policy levers (school meals, food marketing, zoning), physical activity infrastructure (safe routes, facilities, school PE), family and caregiver engagement strategies, and measurable evaluation metrics (process, outcome, impact indicators, study design, data collection, cost-effectiveness). Require a feasible, culturally sensitive plan with SMART objectives, stakeholder roles, sustainability, equity and ethical considerations.