It would be D. The Pelvic Cavity
Because the thoracic cavity is your chest area, the spinal cavity has to do with your spinal cord and the cranial has to do with your brain.
Answer: Maintain flexibility
Explanation: If you maintain flexibility throughout your life, then you'll have to stretch often in order to keep fit.
I think the answer is B. Overload principle.
The overload principle puts load on the body. Usually more than the body is used to.
Hope this helps!:)
C. Getting to know the parents
<span>Sharp, piercing chest pain over the center or left side of the chest, which is generally more intense when breathing in.</span>
