Final answer:
An obesogenic environmental influence on physical activity habits is a lack of safe sidewalks in neighborhoods. This factor discourages physical activity, leading to a more sedentary lifestyle which can contribute to obesity. Contrastingly, environments that encourage physical activity help in preventing obesity.
Step-by-step explanation:
The example of an obesogenic environmental influence on physical activity habits is b. a lack of safe sidewalks in neighborhoods. Obesogenic environments are characterized by factors that promote excessive weight gain, primarily through discouraging physical activity and increasing a sedentary lifestyle. A lack of safe sidewalks makes it difficult for residents to walk or engage in other forms of active transportation, which contributes to a sedentary lifestyle and can lead to obesity.
There is growing evidence that the built environment, such as that with inadequate pedestrian infrastructure, contributes to physical inactivity. In neighborhoods without safe sidewalks, children and adults may be less likely to engage in walking or biking, which are essential for maintaining a healthy weight. This setting forms part of an obesogenic environment, where the physical surroundings create barriers to being physically active.
By contrast, environments that promote physical activity, such as increased sports activities in school or urban areas with developed walking and bike trails, can help combat obesity. These settings provide opportunities for regular physical activity, which is vital for energy expenditure and weight management.