Question

a person with anorexia nervosa
a eats so much food he cannot maintain a healthy body weight
b doesnt eat enough food to maintain a healthy body weight
c displays rigid patterns of behavior that makes it hard for him to get along with others
d displays severe disturbances in thinking, mood, awareness, and behavior

Explanation:

Anorexia Nervosa is an eating disorder where individuals severely restrict their food intake, leading to not consuming enough to maintain a healthy body - weight. Option A describes over - eating which is not anorexia. Option C describes a personality - related issue not related to anorexia. Option D is too general about mental disturbances and not specific to anorexia's main characteristic of food restriction.

Answer:

B. doesn't eat enough food to maintain a healthy body weight