Final answer:
The structure of the pubic arch, the greater sciatic notch, and the sacrum differ between males and females. The female pelvis is wider to accommodate childbirth, and the subpubic angle is larger in females. The female sacrum is wider, shorter, and less curved.
Step-by-step explanation:
The structure of the pubic arch, the greater sciatic notch, and the sacrum differ between males and females. The female pelvis is wider than the male pelvis to accommodate childbirth, as evidenced by the distance between the anterior superior iliac spines. The subpubic angle is larger in females than in males, and the female sacrum is wider, shorter, and less curved. These differences allow for the most accurate sex determination based on hip bones.