**Core Concept**
The human skull exhibits sex differences in terms of size, shape, and certain anatomical features. These differences are primarily due to hormonal influences during fetal development and puberty.

**Why the Correct Answer is Right**
The male skull is generally larger and more robust than the female skull. One notable feature is the presence of a more pronounced mastoid process, which is a bony projection behind the ear. This difference is attributed to the effects of testosterone on bone growth and development. The male skull also tends to have a more pronounced sagittal crest, which is a bony ridge along the top of the skull.

**Why Each Wrong Option is Incorrect**
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**Clinical Pearl / High-Yield Fact**
It's essential to recognize that skull sex differences are not absolute and can be influenced by various factors, including genetics, nutrition, and overall health. However, in general, the male skull tends to be larger and more robust than the female skull.

**Correct Answer:** This question does not provide enough information to give a correct answer. Please provide the correct options for me to complete the explanation.