Final answer:
African officials allowed Jane Goodall to journey to the Gombe Stream Game Reserve to conduct her research because studying nonhuman primates in their natural environment is important for understanding variations in behavior and gaining insights into humanity's ancient past.
Step-by-step explanation:
In the book 'Untamed: The Wild Life of Jane Goodall', Chapter 2, African officials finally allow Jane Goodall to journey to the Gombe Stream Game Reserve to conduct her research because they recognized the importance of studying nonhuman primates in their natural environment to understand variations in behavior and gain insights into humanity's ancient past.
By studying chimpanzees in the rainforest environment of Gombe National Park, Goodall could observe and document their behavior, including hunting techniques and tool use, which can shed light on how our ancestors may have used and constructed tools.