Final answer:
The Pech Merle discoveries support the idea that prehistoric people had an understanding of acoustics and used basic musical instruments, with evidence of more complex cultural significance and practices in music from other prehistoric sites.
Step-by-step explanation:
The discoveries in Pech Merle most likely demonstrate that in prehistoric times, people had a deep understanding of basic acoustics and were likely using basic instruments for music. While the level of complexity in their musical instruments might not be fully understood, studies from other prehistoric sites, like Ancestral Puebloan locations, suggest that early instruments included percussion and woodwind flutes. These were not just for utility but also held cultural significance, indicating a developed musical practice. Furthermore, findings from the El Castillo Cave in Spain suggest that prehistoric peoples experimented with natural acoustics, using the environment itself, such as stalactites, to create music, which further underscores their acoustical awareness.