Final answer:
The biological features of the throat, brain, and genes, alongside archaeological findings like tool use and fire mastery, suggest the emergence of complex human language and the biocultural coevolution of language and culture.
Step-by-step explanation:
The question refers to the three features of human language proposed by Charles Hockett, but the content provided to answer the question actually discusses the biological and archaeological aspects of language evolution in early hominins. If we draw from the provided content, we can infer that the biological features central to the emergence of language in humans include the structure of the throat, the brain, and our genes. These features collectively facilitated the development of a flexible and open-ended communication system that differs from the relatively closed systems of communication found in other species. The archaeological evidence pointing to the emergence of language includes the innovation of tools, the use of fire, and other cultural advancements that would have been enhanced by the ability to communicate complex ideas. This reciprocal relationship between biological evolution and cultural advancement illustrates a phenomenon known as biocultural coevolution.
The intricacy of human language allowed it to become a foundational element in the complex structure of human culture. This cultural complexity, in turn, influenced the biological development of humans, suggesting a co-evolution of language and human culture.