1. is B creeping obesity
2. is A body composition
3. is D the best way to control weight
4. is C resting metabolic rate
It could be muscular endurance, agility, or coordination. But I'm thinking muscular endurance.
Fats and carbs i would say
Before they reach REM stage.
(rapid eye movement)
I believe that a less technical term is known by most people as Fast Metabolism. I do not know the medical term for fast metabolism though. There is also an eating disorder known as Binge Eating.