Final answer:
The late preclassic center Kaminaljuyu controlled vital sources of prestige goods, which were central to trade and maintaining influence in the region.
Step-by-step explanation:
The late preclassic period center Kaminaljuyu controlled sources of various prestige goods. During the Early/Middle Pre-Classic Mayan civilization (2000-1000 BCE), areas like Kaminaljuyu had access to critical materials and goods necessary for trade, expansion, and cultural development. Precious materials such as obsidian and jade, along with agricultural goods like cacao and maize, played a significant role in trade and the economy of the period. The control over these valuable resources was essential for city-states in maintaining power and influence within the region.