Answer:Anorexia nervosa
Step-by-step explanation:
Anorexia nervosa, is a potential life threatening eating disorder, in which nindividuals undergo self starvation or restrict the number of calories they consume in order to loose weight because they think they are overweight when in truth, they are underweight. Anorexia is generally characterized by low weight, food restriction, fear of gaining weight,distorted body image, extremely thin body etc
here, Chasity who began portioning and weighing the food she ate, and also claiming to have already eaten giving rise to significant weight drop from a healthy 115 pounds to 90 pounds typically illustrates the symptoms of ANOREXIA NERVOSA