Final answer:
The claim that the Southeastern United States was one of the world's independent centers for plant domestication is true, with evidence of the domestication of sunflowers, goosefoot, and squash.
Step-by-step explanation:
The statement that the region of the present-day Southeastern United States was likely one of the world's independent centres for plant domestication is true. Research indicates that several plants were domesticated in this region, including the sunflower, goosefoot, and squash. These domestication activities contributed significantly to the rise of agricultural societies in the area, which eventually developed complex cultures and civilizations. This early development of agriculture in the region exemplifies its role as an independent centre for plant domestication alongside other regions such as the Middle East, China, Mesoamerica, and the Andes.