The correct answer is: Dane knows that stress is anything that challenges him psychologically or physiologically and warrants some type of adaptation or adjustment.
Stress is how our bodies responds to what we consider to be a threat. The body's capacity of defending itself are activated because the person is sensing some sort of danger approaching. That "danger" can be real or not, but the way our body reacts will be the same. When we feel stress, is our body trying to protect us from that threat.