Anything that people accept as representing something else is called a SYMBOL.
According to Wikipedia, "symbols take the form of words, sounds, gestures, ideas or visual images and are used to convey other ideas and beliefs."
Answer:
b) the foot-in-the-door phenomenon
Explanation:
Foot-in-the-door phenomenon: In psychology, the term foot-in-the-door phenomenon is referred to as the propensity of an individual to agree to someone for a large or big request after convincing the other person for a small request.
Example: An individual ask his or her friend to help him with some amount as he or she needs it, later on, he or she asked for a big amount.
In the question above, Bart's experience best illustrates the foot-in-the-door technique.
