The ball and socket joint in the hip is similar to the ball and socket joint of the shoulder but is designed more for than

The ball and socket joint in the hip is similar to the ball and socket joint in the shoulder, but is designed more for bio-mechanical strength, stability and ability to carry weight than a wide range of movement.

Explanation:

The kind of weights that the hips carry vary in nature.

Some weights are better described as stationary and others as ,constantly changing.  

Besides carrying it's own weight (that is the upper torso), the hip is also active and instrumental in the ability of mankind to lift and carry additional weights.

The study of how the hip manages these weights effortlessly is important in the design of prosthetic appendages and replacement hips for accident victims and geriatric patients who have one hip issue or the other.

Cheers!

i wanna say it’s between b and d, leaning more towards b.

the part of the wave he is travelling on is the crest