To what...........???????????????????????
The answer is should be D because A includes food tracking, B includes your feelings which is really a diary, C you fitness log should not have picks of ur friends. So that leaves me with D.
Inward then upward, C! I know somebody already answered, but I'm just confirming that answer is correct as I took a class in this sort of stuff! :)
Muscles used:
Arm/Shoulder muscles, Back muscles, and Leg muscles.
Exercise to improve:
Kettlebell or dumbbell swing
Medicine ball side pass
Kettlebell Windmill