Ecological models in health education are essential because they consider multiple levels of influence on health behaviors, including individual, interpersonal, organizational, community, and policy factors. This comprehensive approach recognizes that behavior is affected not just by personal choices but also by the surrounding environment and social context. By addressing these various layers, interventions can be more effective in promoting sustainable health behavior change. Focusing on multiple interacting factors allows for a holistic strategy that can lead to better health outcomes.

Reference: Health Behavior and Health Education, Glanz, Rimer & Viswanath, 5th Edition.