Which eating disorder is characterized by starvation behavior?

Anorexia Nervosa is the eating disorder characterized by starvation behavior. Individuals with this disorder experience an intense fear of gaining weight and often have a distorted body image, leading them to pursue extreme measures to lose weight, including severe restriction of food intake, excessive exercise, and other behaviors aimed at avoiding weight gain. This disorder has significant physical and psychological health implications, as those affected can become dangerously underweight and suffer from numerous health complications due to malnutrition.

In contrast, the other eating disorders listed involve different patterns of behavior and attitudes towards food and body image. Binge Eating Disorder is characterized by episodes of consuming large quantities of food without compensatory purging or restrictions. Bulimia Nervosa involves cycles of binging and then purging to prevent weight gain, rather than outright starvation. Orthorexia focuses more on an unhealthy obsession with eating foods deemed healthy, rather than restricting food intake to an extreme degree.

Therefore, the defining feature of Anorexia Nervosa is its emphasis on self-starvation and the psychological factors that contribute to this behavior.