The picture is a little hard too see
Based on the situation given, we can imply that Jenny is most likely suffering from anorexia nervosa. It is an eating disorder that characterises low Body Mass Index, or BMI, which is a function of weight relative to stature which significantly makes the person lose extreme weight, and inflicts a fear of gaining weight to the person.
I think its 1 not 100 percent sure tho
It helps a plant survive,because not makes food for the plant.without food they can't live.just Luke we can't live without food