I think A.architects' is the right answer, hopefully it is.
Answer:
Adult have more stress, they have more responsibility than kids and adolescence. Some example could be they have house to pay, they need to give the children food, and their certainly very tired after couple hours of working. For adolescence, they don't have that much responsability, they go to school, learn, study and prepared their future. Very old person does not really have a high stress level, their children take care of them, is their time to relax. Middle and high schooler have stress with study homework things related. But adult have the most stress since they have a lot more responsibility, so we can conclude stress affect you with your responsibilities and your feelings, an example is being and love and the other person does not feel the same.
What incident like stock market or like the store ?
Initially Valentine tells says that the two boys are opposites: Peter is a killer and Ender shows empathy. However, as the novel progresses, Ender is beginning to see himself as a killer rather than a sensitive boy who can show empathy.