Final answer:
Neanderthals have nuchal crests.
Step-by-step explanation:
The subject of this question is Biology. The question is about the presence of nuchal crests in humans and NHAs (presumably referring to Neanderthals). To answer this, we can refer to the passage, which mentions several distinctive anatomical characteristics of Neanderthals, such as a larger skull and brain. Therefore, the answer is option 2: NHAs have nuchal crests.