Which crops were primarily planted by Native Americans in Oklahoma?

The correct answer hinges on the agricultural practices of Native American tribes in Oklahoma, many of whom cultivated the so-called "Three Sisters" crops: squash, corn, and beans. This combination was not only essential for their diet but also reflected a sophisticated agricultural system. Each crop played a role in contributing to the ecosystem; for example, corn provided a structure for beans to climb, beans added nitrogen back into the soil, and squash spread across the ground, preventing weeds and retaining moisture.

The Three Sisters were central to the diet and culture of many Indigenous peoples, especially among tribes that relied heavily on agriculture. The growing practices and the cultural significance connected to these crops demonstrated a deep understanding of agricultural sustainability and community.

Other options mention crops that were either not a primary focus for Native American agriculture in Oklahoma or were introduced later by European settlers. While fruit trees and other plants have significance, they do not represent the core agricultural practices prevalent before European contact, as corn, beans, and squash were staples in the diet and livelihood of Native tribes in the region.