Which skeletal feature indicates a male pelvis?

The characteristic that indicates a male pelvis is the narrower pelvic structure. Males typically have a narrower and more robust pelvis compared to females, primarily due to differences in reproductive anatomy and function. The male pelvis is designed more for bipedal locomotion and strength rather than accommodating childbirth. This narrower shape presents differences in the dimensions of the pelvic inlet and the overall pelvic outlet, making it distinct from the female pelvis, which is wider and better suited for childbirth.

The other options highlight features associated with the female pelvis. A wider birth canal is necessary for facilitating labor and delivery, while a rounded pelvic inlet and considerations around femur length pertain more to adaptations in the female pelvis as well. These adaptations reflect the differing biological roles of male and female anatomy in reproductive health and childbearing.