North Africa, region of Africa comprising the modern countries of Morocco, Algeria, Tunisia, and Libya. North AfricaEncyclopÃ¦dia Britannica, Inc.The geographic entity North Africa has no single accepted definition.
A Stressor is anything (physical or psychological) that produces stress (negative or positive) is considered a stressor.
A stressor is a chemical or biological agent, environmental condition, external stimulus or an event that causes stress to an organism. An event that triggers the stress response may include: environmental stressors (hypo or hyper-thermic temperatures, elevated sound levels, over-illumination, overcrowding)