The spread of cancer from its point of origin is called B. Metastasis
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
I only know it's a process of change of matter but I don't remember the exact types
No this is not ethical because its the opposite.
