Answer:
High degree of mobility but a low level of stability.
Step-by-step explanation:
The arrangement of bones and muscles of the pectoral girdle is such that there is a high degree of mobility but a low level of stability. The pectoral girdle is composed of the scapula and the clavicle bones, which are connected to the sternum at the front of the body. The mobility of the pectoral girdle is due to the fact that it is not firmly attached to the axial skeleton, which allows for a wide range of motion in the arms and shoulders. However, this mobility comes at the cost of stability, as the pectoral girdle is more prone to dislocation and other injuries compared to other joints in the body.