I think the best answer would be C. Putting on an act in order to impress others. Hope this helps!
A lymphatic organ that helps develop the immune system is the thymus gland.
1)
Overload PrincipleTo make improvements in your fitness you need to overload your body. You need to stress or challenge the bodily system (aerobic/musculoskeletal) beyond what it is used to.
2) Specificity Principle
Your exercise program must be specifically related to your training goals.
3)
Individuality Principle
"Everyone is different, which means everyone is special)
4) Reversibility Principle
Not being as good as something as you used to.
Answer:
Explain whether or not you feel you eat/drink healthy on a daily basis. Does what your eating/drinking agree with your lifestyle.