The Theory of Planned Behavior is a psychological model that explains how individual behavior is influenced by three key components: attitudes, subjective norms, and perceived behavioral control. Attitudes refer to personal evaluations of the behavior, subjective norms involve the influence of social pressures, and perceived behavioral control reflects the individual's belief in their ability to perform the behavior. This theory suggests that these components collectively shape an individual's intention to engage in a specific behavior. A stronger intention typically leads to a higher likelihood of actual behavior, making it a useful framework for understanding actions in various contexts, such as health, education, and environmental sustainability.