Wellness is based on your mind and body it is generally used to mean a healthy balance of the mind body and spirit
The answer is B. Spine stretch
Spine stretch is an exercise to stretch your back bone, which mean your upper body, not the lower one.
NB :
Hip Flexor : To stretch your thigh
Calf stretch & Harmstring stretch : To stretch your lower legs
1,3,4,6..........those are your answers
A. Virus - flu
B. Fungus - yeast infection
C. Protist - malaria