The answer is a health protective factor.
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The correct option is this: BUILDING PEDESTRIAN FRIENDLY WALKWAYS.
Been active involves participating in physical exercise that will strengthened one's muscles and improve one's health.
Walking is a good type of physical exercise; if the community build walkways that encourage walking, more people will be willing to walk to their destinations rather than taking cars or other forms of transportation and this overtime will create a more active community.
Believing that individuals who are neighbors will automatically know one another reflects the Gestalt principle of proximity.
