Final answer:
An example of an enabling factor is B. living near a hiking trail to encourage walking, as it provides a resource that supports the engagement in physical activity.
Step-by-step explanation:
An enabling factor can be defined as a condition or resource that supports a behavior that leads to a change in health. In the context of the provided choices, B. living near a hiking trail to encourage walking would be an example of an enabling factor. This is because having access to a hiking trail makes it more convenient and appealing to engage in physical activity, which is beneficial for health.
It is important to note that enabling factors are just one aspect of what can influence someone's health behaviors. Other determinants include personal, socioeconomic, and environmental influences. For instance, an individual's decision to eat certain foods or engage in physical activity can be affected by factors such as financial stability, access to fresh produce and exercise facilities, cultural norms regarding diet and leisure activities, and education about the benefits of a healthy lifestyle.