What type of tools were found at the Zhoukoudian site, indicating H. erectus lived there?

The Zhoukoudian site in China is significant for its archaeological findings related to Homo erectus. The correct identification of the tools found at this site pertains to Old Stone Age technology, also known as lithic technology. These tools were primarily made from flint and other stones, demonstrating the early hominin's ability to create and utilize tools for a variety of tasks such as cutting and hunting.

The presence of Old Stone tools at Zhoukoudian indicates that H. erectus had developed a certain level of skill in tool-making during a period when more advanced materials like metal were not yet available. This aligns with the timeline of the Lower Paleolithic period, where these early humans relied on stone tools as their main instruments. This technological aspect reflects the adaptive strategies of H. erectus as they faced environmental challenges.

In contrast, the other tool types specified in the options, such as bronze tools, modern metal tools, and wooden implements, do not fit the timeframe or technological development associated with H. erectus. Bronze tools emerged much later in human history, while modern metal tools were developed even more recently, and wooden implements, while used by various hominin species, were not the primary tools found at Zhoukoudian during the time of H