Which statement accurately describes the surface of a male's skull?

The surface of a male's skull is accurately characterized as rough and robust due to several anatomical features. Males tend to have thicker bones and more pronounced muscle attachment sites compared to females, which contributes to a rough texture. This robustness serves functional purposes, as stronger and more dense skulls provide better protection for the brain and support for the heavier musculature typically associated with males. The differences in skull morphology between males and females are influenced by evolutionary adaptations and hormonal factors, leading to the distinct characteristics observed.

In contrast, other descriptions such as smooth and gracile or flat and delicate would more accurately pertain to certain features of a female skull, which is generally lighter and less pronounced in muscle attachment due to evolutionary and functional differences. Streamlined and light-weight is not representative of male skulls, as they are typically heavier and more robust due to the thicker bone structure. Thus, the characterization of male skulls as rough and robust accurately captures the underlying anatomical and functional aspects of their structure.