Why does a broken clavicle cause restriction of head and arm movement

Clavicle fractures are often caused by a direct blow to the shoulder. This can happen during a fall onto the shoulder or a car collision. A fall onto an outstretched arm can also cause a clavicle fracture.  

answer; i believe that the correct answer is; ///bodies of water store heat during the day and release it at night;

the animal that would be cutest if scaled down to the size of a cat? elephant