Final answer:
President Wilson encouraged using rivers and mountain ranges as boundaries to establish clear and natural borders between nations or regions.
Step-by-step explanation:
President Wilson encouraged that boundaries be set along rivers and mountain ranges. This strategy aimed to establish natural and easily identifiable borders between nations or regions. By using physical features as boundaries, it becomes less likely that there would be disputes over the positioning of the boundaries and reduces the potential for conflicts.
Learn more about boundary setting with physical features