Final answer:
Yes, both Neanderthals and Denisovans showed cultural development. DNA evidence indicates interbreeding with modern humans, and Neanderthals had a more advanced tool-making industry.
Step-by-step explanation:
Yes, both Neanderthals and Denisovans showed cultural development. While there is limited evidence to study their cultural practices directly, genetic studies have provided insights into their interactions and interbreeding with modern humans. For example, DNA evidence suggests that Neanderthals and Denisovans interbred with modern humans, indicating cultural exchange and mating between different hominin populations. Additionally, Neanderthals were known to have a more advanced tool-making industry, called the Mousterian tool industry, which produced smaller and sharper tools.