Final answer:
The sign 'No Smoking' in front of a store represents external pressure exerted to regulate behavior.
Explanation:
External pressure is the kind of factor represented by the sign 'No Smoking' in front of the store. This sign is a form of regulation designed to reduce the negative externalities suffered by non-smokers when they are around smokers. It exerts pressure from outside individuals to conform to a specific behavior or rule.
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