A, because in all, stretching is to reduce muscle tightness and relax muscles. It also can be used as a warm up for sport activities, like a jog, or running a mile, etc.
It's also used a stretch warmup by P.E. Teachers sometimes. If you search up dynamic stretching it shows many stretches, and people do these all the time to prepare for exercise, or to loosen up tight muscles.
Answer:
The answer is Neck region
Exoskeleton and Endoskeleton
Multicellular organisms e.g. man meet their needs through use of specialized systems that they have in their bodies. Examples of such include:
1. cardiovascular system composed of heart, veins and arteries which facilitate transport of nutrients to all parts of the body .
2. Skeletal system composed of bones, joints, ligaments and cartilage whose function is support and protection of the body. <span>
3. Digestive system composed of mouth, esophagus, stomach , small and large intestines whose function is breakdown of food and absorption of nutrients.</span>
