The possible direction of movement of an object accounts for the motion.
The cup shape of the socket allows for nearly circular motion. Hence, option (D) is correct.
What is a Motion?
When an object tends to move from one point to another in a given interval of time, then the object is said to be in motion.
Ball-and-socket joints possess a rounded, ball-like end of one bone fitting into a cup-like socket of another bone. This system allows the greatest range of circular motion, as all movement types are possible in all directions.
Thus, we can conclude that the cup shape of the socket allows for nearly circular motion. Hence, option (D) is correct.
Learn more about the motion of object here:
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