The layer that encloses and protects the heart is
Pericardium
Base trigger (gatillo base)
The answer is the fight or flight response.
The fight or flight response is a survival mechanism in the body in the nervous system. It is how we respond to a stressful situation and is there to protect us from harm. Therefore it is not a risk factor for violence. It's our bodies natural way to protect us from violence.
The other choices are sadly all risk factors for violence.
Nutrition is important in achieving total fitness because it involves eating the right balances of vitamins, minerals and fiber which are essential in maintaining fitness. In addition to physical exercise, nutrition is important in improving overall health and maintaining the right and appropriate weight. When it comes to total fitness, one must take care of the body, mind and spirit and nutrition is part of taking care of the body and mind.