Its called the hippocampus.
I would say all of the above, because all of those seem to be true
-hope it helps :3
Do you have answer choices, or is this an open-ended one?
I do not see any choices but I will give you background on anorexia nervosa- This is basically compulsive exercise and weight loss. Basically this is when people keep keep keep working out and they are at a very low bodyweight . I had a problem with this when I was younger and would not eat. Hope this helps