Answer:
fighting
Explanation:
I think violence could also work but fighting is what definitely fits here.
The answer would be Microfilaments.
1.it is affecting in the way that she stopped eating normally and over exercising
2. her eating habits are affecting physical activity and energy levels because she is not getting enough nutrients that her body needs
3. she wouldn't be allow to go on a diet where they cut her calories and stuff because that could be dangerous but she get into a meal plan where she is still getting all her nutrients and not gaining weight