Question

what is a key characteristic of anorexia nervosa?
purging food after eating to maintain weight
food restriction and extreme fear of gaining weight
eating large amounts of food in one sitting
feeling unconcerned about body image

Explanation:

Anorexia nervosa is an eating - disorder characterized by self - imposed food restriction and an intense fear of gaining weight. Purging is more associated with bulimia nervosa, eating large amounts is binge - eating behavior, and people with anorexia are highly concerned about body image.

Answer:

food restriction and extreme fear of gaining weight