Question

a sign in front of a store says
o smoking.\ what kind of factor is this sign?
external pressure
internal pressure
media influence
peer pressure

Explanation:

External pressure refers to outside forces influencing behavior. A "No Smoking" sign is an external rule set by the store (an external entity) to influence people not to smoke. Internal pressure is self - imposed. Media influence would involve TV, radio, etc. Peer pressure is from friends/peers.

Answer:

external pressure