There could be a variety of reasons why your son is replying to you aggressively. It could be due to a number of factors such as stress, frustration, anger, or feeling misunderstood. It could also be a sign of a larger issue such as a mental health disorder or a difficult home life. It’s important to try to understand the root cause of his behavior, and to approach the situation with empathy and understanding. It’s also important to remember that as a parent, you have a role in setting boundaries and limits for your child’s behavior, while also providing support and guidance. It may also be helpful to seek the advice of a therapist or counselor, who can provide a more in-depth understanding of your son’s behavior and help you develop strategies for addressing it.