Which of the following factors can influence an individual's physical activity behaviors?

The influence of self-efficacy and genetics on an individual's physical activity behaviors is significant. Self-efficacy refers to a person's belief in their ability to successfully engage in physical activities. When individuals have higher self-efficacy, they are more likely to set goals, overcome challenges, and stay committed to regular physical activity. This psychological aspect plays a crucial role in motivation and can determine how actively a person engages in exercise.

On the other hand, genetics can also impact one's physical fitness and capacity for physical activity. Genetic predispositions can influence things like muscle composition, cardiovascular endurance, and even propensity for certain diseases, which can either encourage or hinder an individual's ability to participate in consistent physical activity.

In contrast, while diet and nutrition can complement physical activity, they do not directly influence the behaviors surrounding physical activity initiation and maintenance as strongly as self-efficacy does. Environmental pollution levels and weather patterns can have some effects on people's ability to exercise but don't exert the same fundamental influence on exercise behavior itself as self-efficacy and genetic factors, which are deeply intertwined with personal motivation and capability.