Culture is essentially a system of rules that structures the thought and behavior of social groups. Groups sharing a common culture constitute a society. Sensitive, versatile hands. A vocal tract that can produce a wide range of sounds.
Language is key.
Humans appear to be born with an innate universal grammar. Learned Culture is transferred across generations through teaching and learning. Anthropologists call this enculturation. Education in the broadest sense is at the core of this process. Shared Culture is socially constructed.