Final answer:
Different parts of the brain are indeed stimulated by different stone tool technologies, evidenced by the progression from Oldowan to Acheulean and Mousterian tools, highlighting a connection between cognitive planning in tool creation and complex speech.
Step-by-step explanation:
The statement that different parts of the brain are stimulated by different stone tool technologies is true. As humans developed different technologies for making stone tools, the brain's cognitive functions also evolved to accommodate these advancements. For instance, the production of Acheulean hand-axes required more skill and planning than the earlier Oldowan tools. Similarly, the Mousterian tools, which were used as small knives, represented an advancement from merely shaping cores to creating specialized tools from flakes. These developments in stone tool technology show that hominins like Homo habilis and Homo erectus utilized cognitive planning and foresight, which are essential to the complex speech production in humans. The evolution of the human brain and the corresponding advancements in tools from simple to complex indicate a direct relationship between brain stimulation and tool technologies.