Final answer:
The southwest Indians most probably learned farming methods from their southern neighbors through the process of cultural diffusion, which is the spread of cultural beliefs, social activities, and items from one group to another.
Step-by-step explanation:
The southwest Indians likely learned farming methods from their southern neighbors through the process of cultural diffusion. Cultural diffusion is the spread of cultural beliefs, social activities, and items from one group to another. In this case, the more agrarian societies to the south of the southwest Indians likely passed on their farming methods through trade, intermarriage, and other forms of contact. Over time, these farming methods would have become integrated into the life of the southwest Indians, thus benefitting their societies by increasing their ability to produce food and sustain their populations.
Learn more about Cultural Diffusion