Question

Which activity is not a healthy way if dealing with stress

Answer 1

I don't know what the answer is your book is looking for. But I can come up with many things: stress-eating, (alcohol, gaming, fitness etc) addiction, violence (hurting others or yourself).

Answer 2

One activity is smoking. Cause if you smoke, your causing harm to yourself and the stress becomes more and more frustrating, as smoking adds more to it.