Answer:
The Freudian structure of personality at work in this situation is the superego.
Explanation:
According to Sigmund Freud, the personality has three components: id, ego, and superego. The id is the part that functions with the purpose of satisfying urges, desires, and needs. It is the only part present at birth, so we can think of it as more primitive than the others. The ego is developed from the id. It still works to satisfy the id, but in a more realistic and accepted manner. Finally, the superego is the part that internalizes moral standards, the sense of right and wrong we are taught by society, our parents, etc. It is the superego, therefore, that provides us with guidelines to make judgments and decisions.
As we can see, Ben has chosen to ignore his urge to eat a couple of cookies before dinner. Even though his id wants him to, he chooses to not do it "because it is not right." Ben is making a judgment based on what his mother has taught him. He is, thus, being guided by his superego.