Answer:
negative punishment
Step-by-step explanation:
In psychology, according to the concept developed by B. F. Skinner, there are two types of punishment i.e, negative and positive punishment.
Punishment refers to the phenomenon that leads to decrease a few unwanted behaviors carried out by an organism.
Negative punishment: The term negative punishment refers to the phenomenon in which a particular object, something good, or something desirable is being taken away from an individual to reduce the likelihood of occurrence of a specific behavior.
In the question above, taking away Peggy's allowance served as a negative punishment for her foul language.