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.
stress riser[stres rÄ«zâ²Är] 1. A mechanical defect, such as a hole, in bone or other materials, which concentrates stress in the area and increases the risk of failure of the bone or material at that site. Stedmanâs Medical Dictionary Â© Wolters Kluwer Health.