Which item was a major agricultural product of Mesoamerica?

Cacao was a major agricultural product of Mesoamerica due to its significant cultural and economic importance. The region's indigenous peoples cultivated cacao beans, which were used to make a frothy, bitter drink that held ceremonial significance and was often consumed by the elite. Additionally, cacao beans served as a form of currency, facilitating trade and economic transactions among Mesoamerican societies.

In contrast, rice, wheat, and barley were not indigenous to the region and were primarily associated with agricultural practices in Asia and Europe. As a result, they played a minimal role in the agricultural landscape of Mesoamerica. The prominence of cacao, therefore, highlights the unique agricultural practices of indigenous cultures in this area and their adaptation to local environments.