The answer is through Yevgeny's dramatic change in response.
Explanation:
Textual evidence points to the fact that Yevgeny is not a very attentive father, and not very involved in his son's life. Initially, his actions seems not concerned that his son is smoking, in response to this information of his son even made him laugh. Yevgeny is a prosecutor of the circuit of court, someone who carries out legal proceedings against a person accused of a crime. it makes sense to thimk about how much of Yevgeny's legal background will affect the way he handles this problem of his son (Seryozha).
One of them is that Gatsby to war when he single handedly defeated the German army another one is that all of his family was dead and that he had inherited all of his money from that family
